Product Description Harken 13mm CB Headboard Car AssemblyA Harken Battcar system along with full-length battens helps raise, douse, and reef with ease and acts as extra crew if you're sailing shorthanded. Battcar systems outperform in-mast or in-boom furling, cost less, and you don't need to recut your sail. The one-piece solid aluminum construction is lightweight and strong. The free-rolling ball bearing cars let you hoist and reef the main quickly on all points of sail.Specifications: Length (mm) 132 mm Length (in) 5 3/16 in Width (mm) 40 mm Width (in) 1 9/16 in Weight (g) 188 g Weight (oz) 6.7 oz Maximum working load (kg) 200 kg Maximum working load (lb) 440 lb Maximum headboard thickness (mm) 12 mm Maximum headboard thickness (in) 1/2 in A (mm) 132 mm A (in) 5 3/16 in B (mm) 25 mm B (in) 1 in C (mm) 46 mm C (in) 1 13/16 in E (mm) 5 mm E (in) 3/16 in