Double Ribbed Constant Tension ClampA constant tension stainless steel worm gear clamp designed to compensate for the effects of thermal cycling and or compression set off hose. Turbo Seals convoluted spring action outer band solves this problem and features a unique inner band profile to provide superior sealing pressure via its two raised ribs and the chamfered edges eliminate damage to the hose when tightened. *Unit sold per each.