Ruk Sport SOT Trolley Rubber Protection Cones The Ruk Sport Rubber Protection Cones help protect the scupper drainage holes on sit on tops kayaks. They sit over the uprights and keep there from being any sharp edges on the trolley which could damage your boat. We recommend a set of these with all sit on top trollies. Features: Retro fitting cones for sit on top trolleys. Material: Rubber Pack of 2 Weight: 610g  /  21.5oz Ruk Code: RUKS21