Velux Skylight Operator 900-21657
[900-21657]

Fast shipping, part was just as described. Very happy with product & service. Thank you.

Fit in as a replacement perfectly. Easy to make the switch. Two long screws. However, do not forget to order the Hex Adapter to make your crank fit. This model uses a newer style crank fitting and without adapter it will not crank with a handle.

Is the part I needed. Not built as well it seems but will find out over time. The servive dept was excellent in assisting me getting the part.