Genuine Unistrut P1000 1-5/8" 12 Gauge Steel Strut Channel, Solid Back, Perma-Green III- Green Powder Coated Finish, 5 Foot Length Genuine UNISTRUT Brand 1-5/8" x 1-5/8" Square 12 Gage Steel Strut Channel Solid Back (No Perforations) Channel Green Finish: Perma-Green III- Green Powder Coated Finish