7 1/2 inch yellow plastic Truck seals. Fixed length security seal used to secure Trailer Doors and Transportation equipment. Strongest plastic Trailer seal available. Patented acetal locking Chamber provides superior tamper resistance. Durable, all-plastic, one-piece construction. Weather resistant HDPE withstands extreme cold and heat. Consecutively numbered. Produced in easy-to-use strips of 20 with no plastic waste.