High Quality Material: The tunnel clip is made of high quality ABS material, the clips can provide you with long-term service and won't rust or crack, work well under high temperature and low temperature. Size: The greenhouse clamp is connector type: 19mm. Hose outer diameter: 19mm - 20mm. Wide Application These greenhouse clips are used to attach tarps, shades, greenhouse films or netting to the pipe. It is also an ideal choice compatible building a greenhouse, floor covering or other places if needed. PERFECT FIT: The greenhouse clamps do a great job of holding the mesh securely. Prevents your greenhouse film from being blown away. Easy to clip: This greenhouse net is easy to clip. Save time and energy. The frame shade bar clip is anti-rust and not easy to crack. Smooth and very resistant finish.