Usage Tips:[UNIVERSAL FIT] Great for broken or old toilet seat hinges. Fits for most standard toilet seats with top fix hinge. Suitable for 14 - 16mm hole. [RUBBER BUNGS]The rubber bungs slide into the holes perfectly and when you tighten the bolts they squash up in the holes to make a good tight fit. [THREADED DESIGN]The rubber grommets have a threaded section so you can just push them into the holes in the top of the toilet pan and when you tighten the screw it expands and tightens itself into the hole, without the need of a bolt on the other end of the screw. [PREMIUM MATERIAL]Black Rubber (expandable ball) / ABS Plastic (round cards) / Stainless Steel (screws). Made from strong metal hinges and bolts, better than most plastic fixtures. Colour: black Material: rubber Size: 48mm Package Contents: 4 * toilet seat fixings Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.