Bootstrap Farmer Spring Wire PVC Coated, 10 Pack, Greenhouse Film Spring Lock for Attachment of Plastic Poly Film and Shade Cloth High-quality, reusable, PVC coated steel Spring Wire 6.5 ft. length. Wiggle in channel Tightly secures poly film or shade cloth (up to 20 mil thick) to your greenhouse with minimal effort wiggle PVC coating prevents tears and provides a fast frustration free install. Less stress on hands while installing 6.5 ft. of PVC coated steel 0.083" thick Should be used in conjunction with lock channel (sold separately) Each piece is 6.5 feet in length<br> Width of 1.25&#034; provides superior hold<br> Wire is 1/16&#034; thick which ensuresa secure holdbut workable for easy installation Perfect for attaching poly film (polyethylene plastic)<br> Greenhouse Shade Cloth<br> Any other greenhouse covering up to 20 mil thick