Main -> Glass construction, glass equipment -> Glass components, grounded joint components -> Miscellaneous components Air Leak and Gas Supply Tubes, Rettberg Air leak tubes with ground joints, borosilicate glass 3.3 Ground joint NS Order No. (1) 14 13 40 37111 29 13 40 37121 2 Air leak tubes with ground conical cone, borosilicate glass 3.3 Ground joint NS Order No. 14 13 40 37311 29 13 40 37321 (3) 14 with PTFE spindle precision dispensing cock 13 40 37211