Hinged Bow Roller - Size 1, Suitable for rope and chain anchor rodes utilizing up to 13mm (1/2") chain. Size 1: , L - 320mm (12-5/8"), B - 92mm (3-5/8"), H - 72mm (2-7/8"), h - 133mm (5-1/4"), C - 44mm (1-3/4").