10 Pack, Black, Electric Fence Insulator, For Chain Link Posts, Top Rail, Tube Gates & Corral Panels, Fits Vertical Or Horizontal Tubes/Pipes Up To 2" Round Or Square, Holds Rigid Wire Up To 5/16" & Pliable Ropes Up To 3/8", Extends Wire 3.5" From Post, Can Be Fastened To Almost Anything, Heavy Duty 1/4" Hardware Included.