The RetraxONE MX combines strong, durable polycarbonate with a powerful and incredible scratch resistant matte finish. The RetraxONE MX features a low-profile patented design that streamlines the overall appearance and provides a firm seal. The RetraxONE MX can be locked in any position along the rail and its secured with its own keys. The RetraxONE MX is manufactured from polycarbonate, a durable thermoplastic commonly known as LEXAN , which is reinforced with aluminum rods. This unique construction is sure to keep your cargo safe and secure in the most extreme elements. The RetraxONE MX features a spiral track storage canister that prevents the cover from rubbing on itself as it retracts and closes, and won't obstruct access to your cargo when you need it. The RetraxONE MX glides easily thanks to sealed ball bearings, and installs with easy clamp-on design. RetraxOne MX Retractable Tonneau Cover - Matte One Piece Polycarbonate Finish - 1988-1999 Chevy/GMC C/K/1999-2006 (2007 Classic) Chevy Silverado/GMC Sierra 6' 6" Bed without Stake Pockets - Standard Rails RetraxONE MX Tonneau Cover 1988-1998 Chevrolet C1500 Fleetside 78.0 Bed, 1989-1999 Chevrolet C2500 78.0 Bed, 1988-1998 Chevrolet K1500 Fleetside 78.0 Bed, 1989-1998 Chevrolet K2500 78.0 Bed, 2006 Chevrolet Silverado 1500 78.0 Bed, 1999-2005 Chevrolet Silverado 1500 Fleetside 78.0 Bed, 2007 Chevrolet Silverado 1500 Classic 78.0 Bed, 2001-2003 Chevrolet Silverado 1500 HD 78.0 Bed, 2005-2006 Chevrolet Silverado 1500 HD 78.0 Bed, 2007 Chevrolet Silverado 1500 HD Classic 78.0 Bed, 1999-2004 Chevrolet Silverado 2500 78.0 Bed, 2001-2006 Chevrolet Silverado 2500 HD 78.0 Bed, 2007 Chevrolet Silverado 2500 HD Classic 78.0 Bed, 1988-1998 GMC C1500 Fleetside 78.0 Bed, 1989-1998 GMC C2500 78.0 Bed, 1988-1998 GMC K1500 Fleetside 78.0 Bed, 1989-1998 GMC K2500 78.0 Bed, 2006 GMC Sierra 1500 78.0 Bed, 1999-2005 GMC Sierra 1500 Fleetside 78.0 Bed, 2007 GMC Sierra 1500 Classic 78.0 Bed, 2001-2003 GMC Sierra 1500 HD 78.0 Bed, 2005-2006 GMC Sierra 1500 HD 78.0 Bed, 2007 GMC Sierra 1500 HD Classic 78.0 Bed, 1999-2004 GMC Sierra 2500 78.0 Bed, 2001-2006 GMC Sierra 2500 HD 78.0 Bed, 2007 GMC Sierra 2500 HD Classic 78.0 Bed