Style:Rack with Grids | Size:For 13-16mm Tubes Style:Rack with Grids | Size:For 13-16mm Tubes This innovative, split-frame rack holds up to two different size tubes in the same rack and allows users to quickly switch grids to hold other sizes as needed. Each rack frame includes a set of grids in one size. Grid sets in alternate sizes can be purchased as needed 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.