The Invisible Balance has been used for over 25 years, primarily for wood windows. They are an excellent choice for historic window renovations, eliminating exposed hardware and maintaining the original window appearance. This product is the favorite of the custom millwork industry when jambliner aesthetics are not acceptable. Mounted in the side of the window sash.
"A" type: Single Spring
"AX" type: Double Spring

152 Invisible Balance. 23-1/2" balance length. Sash weight 10-12 pounds. Single Spring invisible balance. Glass Height: 22". End Bracket attached 900-17773.…
162 Invisible Balance. 25-1/2" balance length. Sash weight 10-14 pounds. Single Spring invisible balance. Glass Height: 24". End Bracket attached 900-17773.…
172 Invisible Balance. 27-1/2" balance length. Sash weight 10-14 pounds. Single Spring invisible balance. Glass Height: 26". End Bracket attached 900-17773.…
223 Invisible Balance. 37-1/2" balance length. Sash weight 20-24 pounds. Single Spring invisible balance. Glass Height: 36". End Bracket attached 900-17773.…
141AX Invisible Balance. 21-1/2" balance length. Sash weight 14-20 pounds. Double Spring balance. Glass Height: 20". End Bracket attached 900-17773. Number Stamped…
141AX Invisible Balance. 21-1/2" balance length. Sash weight 14-20 pounds. Double Spring balance. Glass Height: 20". End Bracket attached 60-518HD. Number Stamped on…
141AX Invisible window balance. 21-1/2" balance length. Sash weight 14-20 pounds. Double Spring balance. Glass Height: 20". End Bracket attached 900-21263. Number Stamped…
152AX Invisible window balance. 23-1/2" balance length. Sash weight 20-26 pounds. Double Spring balance. Glass Height: 22". End Bracket attached 900-17773. Number…
153AX Invisible window balance. 23-1/2" balance length. Sash weight 26-32 pounds. Double Spring balance. Glass Height: 22". End Bracket attached 900-17773. Number Stamped…
161AX Invisible window balance. 25-1/2" balance length. Sash weight 18-23 pounds. Double Spring balance. Glass Height: 24". End Bracket attached 900-17773. Number Stamped…
162AX Invisible window balance. 25-1/2" balance length. Sash weight 23-28 pounds. Double Spring balance. Glass Height: 24". End Bracket attached 900-17773. Number Stamped…
173AX Invisible window balance. 27-1/2" balance length. Sash weight 28-34 pounds. Double Spring balance. Glass Height: 26". End Bracket attached 900-17773. Number Stamped…
174AX Invisible window balance. 27-1/2" balance length. Sash weight 34-38 pounds. Double Spring balance. Glass Height: 26". End Bracket attached 900-17773. Number Stamped…
174AX Invisible window balance. 27-1/2" balance length. Sash weight 34-38 pounds. Double Spring balance. Glass Height: 26". End Bracket attached 60-518HD. Number Stamped…
184AX Invisible window balance. 29-1/2" balance length. Sash weight 38-42 pounds. Double Spring balance. Glass Height: 28". End Bracket attached 900-21263. Number Stamped…
192AX Invisible window balance. 31-1/2" balance length. Sash weight 25-32 pounds. Double Spring balance. Glass Height: 20". End Bracket attached 900-17773. Number Stamped on…
201AX Invisible window balance. 33-1/2" balance length. Sash weight 22-28 pounds. Double Spring balance. Glass Height: 32". End Bracket attached 900-17773. Number Stamped on…
214AX Invisible window balance. 35-1/2" balance length. Sash weight 40-44 pounds. Double Spring balance. Glass Height: 34". End Bracket attached 900-17773. Number Stamped…
214AX Invisible window balance. 35-1/2" balance length. Sash weight 40-44 pounds. Double Spring balance. Glass Height: 34". End Bracket attached 60-518HD. Number…
223AX Invisible window balance. 37-1/2" balance length. Sash weight 36-42 pounds. Double Spring balance. Glass Height: 36". End Bracket attached 900-17773. Number Stamped on…
223AX Invisible window balance. 37-1/2" balance length. Sash weight 36-42 pounds. Double Spring balance. Glass Height: 36". End Bracket attached 60-518HD. Number Stamped…
224AX Invisible window balance. 37-1/2" balance length. Sash weight 42-48 pounds. Double Spring balance. Glass Height: 36". End Bracket attached 900-17773. Number Stamped…
224AX Invisible window balance. 37-1/2" balance length. Sash weight 42-48 pounds. Double Spring balance. Glass Height: 36". End Bracket attached 60-518HD. Number…
234AX Invisible window balance. 37-1/2" balance length. Sash weight 42-48 pounds. Double Spring balance. Glass Height: 38". End Bracket attached 60-518HD. Number Stamped…
244AX Invisible window balance. 37-1/2" balance length. Sash weight 42-48 pounds. Double Spring balance. Glass Height: 40". End Bracket attached 900-17773. Number Stamped…
244AX Invisible window balance with 60-518HD end clip. 37-1/2" balance length. Sash weight 42-48 pounds. Double Spring balance. Glass Height: 40". End Bracket…
244AX Invisible window balance with 900-21263 end clip. 37-1/2" balance length. Sash weight 42-48 pounds. Double Spring balance. Glass Height: 40". End Bracket…
253AX Invisible window balance. 37-1/2" balance length. Sash weight 36-42 pounds. Double Spring balance. Glass Height: 42". End Bracket attached 900-17773. Number Stamped…
253AX Invisible window balance. 37-1/2" balance length. Sash weight 36-42 pounds. Double Spring balance. Glass Height: 42". End Bracket attached 60-518HD. Number Stamped…
253AX Invisible window balance. 37-1/2" balance length. Sash weight 36-42 pounds. Double Spring balance. Glass Height: 42". End Bracket attached 900-21263. Number Stamped…
254AX Invisible window balance. 37-1/2" balance length. Sash weight 42-48 pounds. Double Spring balance. Glass Height: 42". End Bracket attached 900-17773. Number Stamped…
254AX Invisible window balance. 37-1/2" balance length. Sash weight 42-48 pounds. Double Spring balance. Glass Height: 42". End Bracket attached 60-518HD. Number Stamped…
1804AX NuAire Window Balance. Invisible window balance. 18" balance length. End Bracket attached 60-518HD. Number Stamped on Window Balance: 1804AX.…
1902AX NuAire Window Balance. Invisible window balance. 19" balance length. End Bracket attached 60-518HD. Number Stamped on Window Balance: 1902AX.…
1903AX NuAire Window Balance. Invisible window balance. 19" balance length. End Bracket attached 60-518HD. Number Stamped on Window Balance: 1903AX.…
1905AX NuAire Window Balance. Invisible window balance. 19" balance length. End Bracket attached 60-518HD. Number Stamped on Window Balance: 1905AX.…
NuAire Window Balance. 2301AX Invisible window balance. 23" balance length. Double Spring balance. End Bracket attached 60-518HD. Number Stamped on Window Balance:…
NuAire Window Balance. 3003AX Invisible window balance. 30" balance length. Double Spring balance. End Bracket attached 60-518HD. Number Stamped on Window Balance:…
Attaching clip usually needed for the 60-AX balances.…
Balance end bracket. Bags of 25.…