500PCS,200mm,Glass Melting Point Capillary Tube,8",ID 0.9-1.1mm,Both Open-End Capillary tubes are open on both ends. Sealed in a bunsen burner flame. Approx 500 in tube. Length 200 mm / 8" ID 0.9-1.1 mm Wall Thickness 0.1-0.15mm Borosilicate glass