The windows no longer open. There are four

Thanks for reaching out to us. It sounds like you need new crank operators. Unfortunately, the sticker in your photos doesn't tell me anything about the hardware used on this window.

This service requires clear and unobstructed photos of the actual part you're trying to replace. In the case of operators, full removal is necessary prior to taking your photos to ensure that no important details are hidden. Once I see that, I can check our inventory for a possible match. Thank you!