... tamper-evident and numbered polymer shell. Keyless, single use bolt locks provide a high level of security and tamper-evidence ... . Steel, heavy-duty, high-security bolt seals for intermodal Containers, Trucks, Railroad Cars, Air Cargo ... ISO/PAS 17712 (C-TPAT) Modelcar door rubber seals bolt sealsMaterialHIgh grade A3 steel and ABS plasticSpecification1.10mm diameter steel ...