T O K G O - Kayak Marine Boat Infarctate Scupper Stopper Bungs Drain Holes Plugs Accessories (4 PCS) Diameter:4 cm / 1.58 in . Height:2.74 cm / 1.08 in Please confirm the size whether you need before purchase. High quality material, strong and durable. Easy to install and use. This is a kind of infarctate scupper stopper which can be used to plug the scupper holes tightly in your ocean kayak.