NTN 626ZZ bearing POM is more durable than nylon outside diameter is 35mm Fuyang Zijie Sports Oars Co., Ltd. (China) specializes in producing carbon oars & paddles like Sculling Oars, Sweep Oars, Surf Paddles, Outrigger Paddles, Kayak Paddles, Canoe Paddles, Dragon Boat Oars, Sea Kayak Oars and related accessories for Rowing Boats, Racing Kayaks and Canoes. POM sliding seat rolls for racing boat