Interlock 4203 4201

This appears to be a portion of a hinge assembly for a casement window. We don't sell just these two arms by themselves, but we do sell a complete hinge kit. See our 36-048. This includes a 10" long top and bottom hinge assembly that an be used for either left or right hand facing windows. As long as your sill track is 10" long, and as long as you replace the top and bottom at the same time, then I am confident that this hardware will work for you.