Here are the diamond tubing, one special sizes high borosilicate glass tubes and rods that we can produce O.D 6mm-315mm borosilicate glass tube and O.D 4mm-30mm for borosilicate glass rod: with 3.3 lineary expansion, good waterproof and acid-resistant ,for industrial, chemical, handcrafts&gifts purpose diamond borosilcate tubing high borosilicate glass pipe