A: 12″. B: 18″. C: 33″. D: 31.5″. E: 14″. F: 1.13″. G: 6″ R. H: 5.88″ R. Weight: 583 lbs. ? Made from ASTM A27 cast steel and are built to withstand the toughest conditions. No surface paint or finish to maintain quick, easy and safe weld-ability to the deck of any barge or workboat. Designed specifically to guide mooring lines on deck. They act as a guide to feed a line or wire in a particular direction while minimizing chaffing. They are typically welded to the deck of a vessel.