Bolt installation size: ceramic hole diameter 14mm-16mm can be Strong applicability: bolts can be installed on Q-foot and square seat toilets Toilet lid bolts: new original nylon material, good rigidity, good shape, excellent firmness and not easy to break. Stainless steel joint bolts: the bolts do not contain any plastic gaskets and stainless steel gaskets. Some toilets don't need seals. If you need gaskets, you can buy them separately! Warm reminder: please confirm whether the size is suitable before purchasing. Easy to install: They are easy to install in minutes, just remove the old bolts, clean the area and install the new bolts. Wide Application: These toilet lid expansion screws are universal and suitable for openings of 14 to 16 mm. They fit most standard toilet seats. White colour Dimensions: 4.4*1.4cm Quantity delivered: 2 pieces Product dimensions are all measured by hand, there are errors and the actual product shall prevail. Product color is affected by shooting light view and there is a slight color difference, which depends on the actual product received.