- Black sealing gasket: inner diameter of 87mm, outer diameter of 107mm - White sealing gasket: inner diameter of 87mm, outer diameter of 109mm - Suitable for most kitchen sink drain holes with a diameter of 110mm - Made of rubber and PE, durable - Easy to use: simply replace the broken parts of the pop-up plug with the O-ring on the push-up drain valve to effectively save water - Package contents: 2 sets of sink sealing gaskets, 2 black pieces, 2 white pieces