The Covermate 1 Eco is our best selling cover lifter!! Black powdercoated Rust-free construction Non-corrosive composite mounting brackets. Requires just 14-18" of clearance behind spa 12-point, 14-inch mounting system provides ultimate strength. Fits virtually any spa up to eight feet (Except J-400 Collection Hot Tubs) in width. Available with extended pivot arms and extended brackets for larger spas. For Jacuzzi Hot Tubs, the CM1 works best on our J-300 Collection Hot Tubs. See a copy of the installation instruction sheet here.