Complete package with all necessary vang cleats, blocks and lines to create a 15:1 vang system. Supplied with swivel cleat and ball bearing blocks. The combination of a 4 mm control line and 3 mm Dyneema line offers the best feeling and reduces friction. Easy to assemble on the existing boom and mast fittings. Laser ® is a registered trademark of Velum Limited an Performance Sailcraft Australia Ltd.This product is compatible with Laser ® but is not an original Laser ® product.