Premium snap tracker bolt seal for containers Model Bolt seal Material High grade q235a steel (pin &bush) and abs cover Total size 7.9 * 21.8 mm Marking size 7.9 * 80.6 mm Color Blue/green/yellow/others Imprinting Laser-etch, hot stamping Marks Bar code, number, name Strength 20kn Applications Containers, trailers , trucks, van trucks, tank trucks, railway wagons, rail-trains, doors, cars Bolt seals instruction: 1. Insert the pin into the slot to close. 2. Push the barrel and the pin on the tip end until it locks. 3. Record the seal number to control security. Our products are customized, and price is affected by its materials, dimensions, colors, quantity, technicals