Clutch Plug Rib in Sand for Coolaroo Custom Outdoor Roller Shades. Fits into the 40 mm diameter head rail of custom Coolaroo Outdoor Roller Shades (not compatible with off-the-shelf models) and works with both corded and cordless styles. Each shade requires (1) Clutch Plug Rib and (1) Idle End Plug Rib (sold separately). Sold individually, includes (1) Clutch Plug Rib.