Dual Wall 3:1 Shrink Tube Kit &ndash; The Brute (1 Per Quantity) 66 pieces of 10 different sizes of adhesive-lined polyolefin shrink tube (in black & red). 6" cut lengths I.D. range is 1/8" - 1" as supplied. Shrink tube is flame retardant and self-sealing. Dual wall 3-1 polyolefin UL listed E-157227 MIL-DTL-23053/4. All contained within a durable lightweight translucent carrying case (11" x 6-3/4" x 1-3/4").