Our 99-64 Lazy Jack kit is great for most boats up to 48'. Featuring a "third" control line for longer length booms. Contains vinyl covered wire, ball bearing blocks covered in leather and a simple yet elegant design that is easy to install. Boat Size 37'-48' (11.3 m-14.6 m), Mainsail Luft 39'-50 (11.8m-15 m), Boom Foot 12'-16' (3.7 m-4.9 m), Included Wire (vinyl coated) 16' (4.9 m), Included Line (yacht braid) 92' x 5/15" (28 m x 8 mm), Weight 9 lbs. (4.08 kg)