I need Right and Left hand for our bay windows

Thanks for writing in! The part with the 31272 on its arm is the casement window hinge. This mechanism functions separately from the window operator. I'm certain we can supply a replacement for it but I'll need to know the measurement for the track installed to the window sill.

The operator reminds me of the 39-382 Casement Window Dyad Operator. To confirm that this is the correct match, carefully review and compare the specifications.

The opposite version can be found tagged below along with their compatible hardware and accessories.

Alternate image for 39-382