Use with faucet and toilet supply tubes. Assortment includes 2 each: 5/16" I.D. x 23/32" O.D., 3/8" I.D. x 23/32" O.D., 7/16" I.D. x 5/8" O.D., and 7/16" I.D. x 3/4" O.D. Do it carded.