The pair of Bel-Art Scienceware 500250020 bare-hand glove box entry ports provides protected access to any glove box with an 8" outer diameter (O.D.) port (glove box not included). The ports provide unconstrained access for use with delicate instruments when working with long-sleeve gloves can be awkward. Each port is constructed of ten layers of silicone latex rubber with 30 points of pliant material to maintain the seal around the arm. The set includes two bare-hand glove box entry ports with a 7-5/8" inside diameter (I.D.) designed for use with glove boxes with an 8" O.D. port. Bel-Art Products manufactures scientific products, including labware, testing equipment, and safety supplies, under the Bel-Art and Scienceware brands. The company, founded in 1946, is headquartered in Wayne, NJ. Research, industrial and healthcare professionals rely on SP Scienceware 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. SP Scienceware 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.