Special heavy-wall tubing for large-diameter cables. Excellent for battery cables, inverter cables, or windlass wiring. 3:1 shrink ratio. UL 224.Adhesive-Lined Heavy Wall Tubing Specifications (3:1 ratio) Size Shrinks To Wire Range (AWG) 3/4" 19mm 1/4" 6mm 8-2/0 8-62mm2 1" 25mm 3/8" 9mm 2-4/0 32-103mm2 1 1/2" 38mm 1/2" 12mm 4/0-500 MCM 103-253mm2