30 Pcs Polycarbonate Greenhouse Panels U Connector Profile U Polycarbonate Profile U Channel U End Cap for Twin Wall Greenhouse Panels Prevent Dust, Rain, Fit 6mm or 4mm Panels, 2ft Length

Really appreciate the quality of the items

Arrived on time, exactly as described on line, cost was extremely competitive. The size matches the 2x4 polycarbonate panels that I will be using as the roof of my reclaimed wood window greenhouse.

Replacing roof panels in my greenhouse. Panels ate excellent.

I tested these on both 6 mm panels and 4 mm panels. They fit well and make a good tight seal on the 6 mm panels but are fairly loose on 4 mm panels. Should be used only on the upper ends of panels to allow for expansion and contraction and to keep moisture out which causes mold to form inside the panels. You do not want an air-tight seal.

Perfect. There were no issues with connectors being different sizes. They are strong and easy to install.

They work but don't fit the greenhouse like the original ones did.

Hard to use. Doesn't fit well into the channel piece to connect. Very frustrating

Light weight and easy cut with razor knife