You are buying Hettich hinge restrictors which will reduce the opening of doors so they dont hit walls and other cupboards.

For use with Hettich Sensys 110 degree hinges and reduces the opening from 110 to 85 degrees. 

One clip should be installed to each hinge within a cupboard.

Hettich part number 9072540. 

I can get other Hettich hinge restrictors on request and will only sell through eBay.

Thanks for looking.