... different colors available 4.low coe:3.3 Borosilicate Color Glass Tube Available colorsClear,Opaque white,opaque black,transparent black,Dark blue ... x 4mm, 51 x 4.8mm Note: standard length of clear tubing:1500mm; standard length of colored tubing:1220mm Using the ... to send us inquiry if you are interested in glass tubing, glass pipes, waterpipes and so on. colored borosilicate pyrex glass tube & rod