Acts as a shock absorber on mooring lines or anchor to protect deck fittings S - 25cm long suitable for up to 16mm rope M - 36cm long suitable for up to 18mm rope L - 40cm long suitable for up to 24mm rope Can be used with rope or chain S size suitable for vessel up to 3tons M size suitable for vessel up to 15tons L size suitable for vessel up to 25tons Suitable for any construction of rope and Craft. Made in England, High quality weather, salt water resistant product.