The vast majority of the glass bongs and bubblers in our collection are made from top quality borosilicate glass. Boro, as it has become known, is a tough, durable type of glass with a very high resistance to thermal stress or heat shock. Scientific glass refers to borosilicate glass pieces that are equipped with ground glass-on-glass joints. That is, glass bongs or water pipes with standard sized joints – usually 10mm, 14.5mm, 18.8mm or 29.2mm – that are compatible with standard-sized adapters, slides, vapour domes etc. Sci glass pieces from the world’s leading flameworkers such as Roor, JM Flow Sci Glass, Grace Glass, Illadelph and many more are available to buy now from EDIT – the world’s largest headshop.