Bel-Art Tubing Connector 22-Piece Assortment; Polypropylene (H19570-0000): Science Lab Consumables: Office Products. Chemical-resistant polypropylene for use with a wide range of liquids or gases 。 Includes 12 Stepped Tubing Connectors and 10 Straight Tubing Connectors 。 grade polypropylene for direct contact with food, drugs, and cosmetics 。 Autoclavable 。 This assortment of stepped and straight tubing connectors comes in handy around the laboratory, and contains fittings compatible with tubing from 3. to .7mm (/8 to /"). Includes Stepped Tubing Connectors and 0 Straight Tubing Connectors. Chemical-resistant for use with a wide range of liquids or gases. grade polypropylene for direct contact with food, drugs, and cosmetics. Autoclavable. Research, industrial and healthcare professionals rely on for their sample handling needs. Sold worldwide, Bel-Art and H-B Instrument brand laboratory supplies include over 5,000 items from safety wash bottles to fume hoods, thermometers, racks, desiccators, hydrometers, ice buckets, scoops and spoons. Custom calibration services, plastic molding, specialty coatings and wire manufacturing are also available. Wilmad-LabGlass brand laboratory glassware complements Bel-Art and H-B Instrument with over 7000 items including NMR and EPR consumables and specialty glassware, as well as custom fabrication for individual glassware, glass repair services and OEM glass parts. is a division of Warminster, PA based SP Industries which also include SP Scientific laboratory, thermal management, and pharmaceutical production equipment and SP Ableware aids for daily living. 。 。 。