The rodent proofing barrier consists of 1/24" (1 mm) thick stainless-steel wires.  The All-In-One seal is sold in long rolls. You cut off only what you need, so you avoid the waste that is usually associated with fitting door sweeps that come in short standard lengths such as 4 feet (1.2 m). The longest rolls (12 yd = 11 m) come in very handy small boxes measuring 3x16x16 in (7x40x40 cm).With a roll in the back of his / her service van a tech can quickly and effectively handle most rodent proofing jobs on the spot.