Borosilicate glass tubing 1) Material: neutral borocilicate glass (USP I) 2) Expansion coefficient: 5.0 and 7.0 3) Size: Glass tubing1) Material: neutral borocilicate glass (USP I)2) Expansion coefficient: 5.0 and 7.03) Specifications: diameter 10mm-30mm; thickness 0.4mm-1.2mm.4) Special specifications can be made