Borosil manufactures and exports high quality tubing, blown ware and press ware using state of the art equipment. They offer ground joints. BorosilĀ® brand ground joints are precision ground high quality interchangeable joints appropriate for rapid and convenient assembly of apparatus for majority of laboratory applications. These are manufactured from medium wall uniform tubing and careful attention is paid to accuracy of form, uniformity of surface finish, profile and taper to reduce the possibility of leakage and joint `seizure`. The outer joints have extra glass tooled onto rims to add a chip resistance. These joints are triple tested for proper taper control, for mating and for vacuum. The taper is as required by bureau of indian standard specifications. These are also available in two different models.