Poly Lock Channel and Spring Wire Greenhouse Film Fastening System - 6 ft.
Am a retired beginning gardener and built a 300 sq. ft. greenhouse. Using this fastening system was unbelievably simple. The assistance I received from the staff was outstanding. The hardest part of this entire build COULD HAVE BEEN the install of the plastic (used the 12 mil.). BUT the Tunnel Vision system makes this a dawdle for any gardener, especially the new one. All was reasonably priced and superbly made. Add to all this they send you install videos is amazing. If you are thinking of using a different or cheaper product, STOP!! Tunnel Vision is superb product, outstanding customer support thru install, and easy to use!!