(20) Unistrut End Protection Caps for US Strut (1-5/8" x 1-5/8") Bag of 20 End Caps for Deep Unistrut (1-5/8" x 1-5/8") Protection caps for US Deep style strut channel. Blue Plastic end caps with grooves gives finished look to pipe supports. End Cap for Deep Unistrut (1-5/8" x 1-5/8") Sharp edges are completely covered.