Feature: Package includes 2 pairs of blind hole hinges, universal rubber expansion fittings, washer screw nut bolt. Fits most standard toilet seats with fixing hinge The plastic washers will not rust like metal. The quality rubber does not break easily. Suitable for 14-19mm holes for 2 toilet seats, uses Universal. Specifications: Steel screws Material: Steel Diameter: 5.7 mm Length: 48 mm Color: Silver Tubular nut Material: Rubber Diameter: 18 mm (thicker), 14 mm Length: 40 mm Color: black Washer Material: rubber Diameter: 14 mm Color: white Package includes: 4 screws