Specification: Steel Screw Material: steel Diameter: 4.6mm / 0.18inch Long: 48mm / 1.89inch Color: silver Tube Nut Material: rubber Diameter: 18mm / 0.71inch(thickest), 14mm / 0.55inch Long: 40mm / 1.57inch Color: black Washer Material: plastic Diameter: 28mm /1.10inch Color: white Feature: They are very easy to fit done in a matter of minutes, simply remove old bolts clean around the area and fit the new bolts. Supplied with 4 soft plastic washers, when you tighten the bolts the washers crush down into the holes and you need to be careful you do not tighten the bolt so much it pushes through the washer. Package include: 4 x toilet seat screws