Product categories Laboratory Glassware Electronic Balance Electronic Meter Portable Burner Models Medical Equipment Thermometer Microscopes Laboratory Plasticware Stopwatch Gas Installation Flat Bottomed Flask CHARACTERISTICRound Bottom Flask2 Angled Neck24/40 Center Joint in the central and sideMade of borosilicate glass Inquiry now Contact Us Product Details Star Labs 1000ml Glass 2 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 1L (1 Liter) Specification