Tubing Connectors, model Z178489 is manufactured by SP Scienceware. This product is suitable for five sizes (tubing i.d. 5/16 ‑ 9/16 in.) of tubing and will connect the same size tubing at both ends or act as a reducer of any combination in the range. When unnecessary lengths are cut for unrestricted flow, the inner diameter increases with the size of the notch. This Molded PP connectors can be autoclaved at 121 °C (250 °F).