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

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.…
End Clip for channel balance. If buying separately without balances, must order 25.…