Calcutta Kettle Cove Sunglasses Camp Cookware & Accessories The quilt uses thermally efficient box Design Details High strength The quilt uses thermally efficient box baffled construction to maximize warmth and comfort for a high performance Heavy duty Class 1 welded link chains for trailers up to 2000 lbs Zinc plated finish to resist rust with heavy steel hook and safety clip that latches to keep chains attached to tow vehicle Features a chain size of 3 16 and mounts with 3 8 bolts This product meets SAE and V 5 standards Two 24 chains are included per package NOTE Do not mount chains to trailer tongue with the same bolts used to mount the coupler Cross safety chains under coupling allowing only enough slack for turns Corrosion resistant polarized lenses with extra lens coating to reduce mirror lens flaking Authentic Calcutta logo