Oar Collar Plastic Ø 45 mm × 55 mm Black - 6 pcs | 4BoatsSix Oar Collar plastic collars for 45 mm oar shafts, designed to protect the shaft where it meets the rowlock. Internal diameter: 45 mm (1. 77 in) Contact length: 55 mm (2. 17 in) Material: weather resistant plastic Colour: black Protects the shaft at the rowlock and reduces abrasion Fitment: designed for 45 mm shafts trim to fit if required Care: rinse with fresh water, clean with mild detergent; avoid prolonged UV exposure