Drop Down Flap Stay, Automatic Opening, 244 mm Version, for Wooden/Aluminium Frame Doors - Häfele U.K. Shop
Strong, Draught-Proof, Double-Glazed drop down lid stay - Alibaba.com
Specialist Hinges | Hinges | Screwfix
Morinbo Toy Box Soft Close hinges, Lid Stay 105 Degree Open with Soft Close, Lid Support for Toy Box and Upward Top-Opening Flap Doors, Easy to Install (Pack of 2) : Amazon.co.uk: