Bootstrap Farmer Snap On Clamps, 3/4 inch 100 Pack, Row Cover Clips for Greenhouse Plastic Shade Cloth Attachment – PVC… Price: $54.99 (as of 26/10/2020 05:13 PST- Details)

Easily attaches poly film, shade cloth, netting and other material to 1/2″ EMT conduit
ABS plastic is reinforced for excellent durability and metal holding clip for extra holding power
Front resistant and UV stabilized for reliable long-term use outdoors