This pump requires a Rule float switch to operate automatically (sold separately - see related products)

They keep the block aligned correctly by pushing the lashing line to the outer edges of the block's head

outer: 25 mm

Low friction ball bearing system

3M 5200 Fast Cure white 296ml PNP This pump requires a Rule3M Marine Adhesive Sealant is a fast curing white polyurethane that chemically reacts with moisture to quickly deliver strong flexible bonds with wood and fibreglass. Creates water tight seals above and below the waterline and ideal for use when installing through hull fittings. Watertight Bonding Sealing of Gelcoat Fibreglass & Wood Ideal for Through Hull Fastening, Deck Fittings, Railings & Transducers Flexible Cures in 24 hours High Strength