Tubes are suitable for tissue culture work and general bacteriological use. Tubes are made from Kimax-51 borosilicate glass in compliance with ASTM Specification E438, Type I, Class A or B glass requirements. Each tube has a chevron marking area. Trays are shrink wrapped in plastic film in modular trays. Supplied without caps. See Kimble 73800, 73802 and 73805 for caps. Approximate overflow capacity (ml): 12mL. O.D. x L (mm): 16 x 100. GPI Thread: 15-415. Kimble #: 73750-16100.