or
Tubing, Vacuum Pump, Welch; Rubber tubing with thick walls for pressure, vacuum work; Color: Red; I.D.: 1.18 in. (20.6mm); Wall thickness: 0.4 in. (9.5mm); O.D.: 1.56 in. (39.7mm); Fits models M4C2, M6C, M8C, M12C and M16C