These 3.5mm cable seals are C-TPAT compliant and help prevent tampering on shipping containers and cargo vehicles. Without cable cutters, they are impossible to remove, and when they are cut, the non-preformed strands splay which prevents would-be thieves from disguising their crimes. The seals are packaged 250 per case. The case dimenisons are 12"x10.5"x6" and weighs approximately 23Lbs.