Searching for k & K 20150

I'm afraid that I couldn't match that number up to anything in our inventory. Can you show me a picture of the part in question?

Thanks! Looks like you need a new casement window operator. Start by looking at our 39-031 and 39-032, which closely match your original style in terms of design. I recommend going over our dimensions just to be 100% sure that they line up. There are other, similar styles in different sizes.