OBSOLETE. J-PRO Cable support system, with hammer-on beam clamp for use with flanges 5/16 1/2 (7.9mm 12.7mm) thick, rotates 360 degrees, 0.75 (19.0mm) max. bundle capacity, nylon 6.6 with metal attachments, natural, 50 pc. package quantity. nylon 6.6 with metal attachments, natural, 50 pc. package quantity.