The toilet seat fixings kit are are strong, corrosion resistant and offer great strength and durability. Fits for most UK standard size toilet seats with top fix hinge. Suitable for 14-16mm hole. Fine Copper Nut Made of pure copper, firm and reliable. Elastic Rubber Sleeve Strong elasticity and corrosion resistance. Stainless Steel Screw Corrosion resistance, durable. Put these toilet seat screws in the toilet mounting holes. Convenience and saving time.