[dimensions] WC fitting 14 - 18mm universal toilet seat hinge, fits most standard toilet seats with top hinge.Before you buy: Remove the old screws and bolts from the toilet lid and compare the dimensions with the new replacement hinges.[reliable quality] The toilet ring fixing hinge is made of high quality stainless steel, the expanded rubber top nut screw is made of high quality rubber and provides good protection against screws.[simple to use] the toilet ring fixing hinge has a threaded section, when you tighten the bolt, push inside the hole to form a good interference fit, it will expand and tighten into the hole itself -even without the need for a bolt on the other end of the screw.[What you get] 5 pairs of different styles and lengths of toilet lid screws hinges fixings which can meet the needs of most toilet lids on the market.You can replace it at any time.[Multipurpose] Toilet seat clips are used for hinges fixed on the top of the toilet and are suitable for most standard toilet seats and top fixed hinges.