FREE SHIPPING—4 FOOT ROLL of 1/8″ RED 3:1 Shrink Ratio POLYOLEFIN heat shrink tubing. Dual wall, Adhesive Lined. Really nice tubing. Brand New, manufactured this year. Shrinks from 1/8″ inside diameter down to .041″ or 1/24″ inside diameter. With the glue it shrinks to zero. Completely waterproof.