Standard polypropylene spigot with for NALGENE® carboys (B6875-1); accepts 5/8-inch (16-mm) I.D. tubing. Also includes HDPE tubing adapter which takes tubing with 1/4- or 5/16-inch (6-13 mm) I.D. B6875-2 is identical to B6875-1, but body and plug are Tefzel ETFE. Does not include tubing adapter. Best for applications with selected solvents and other chemicals where PP spigots are unsatisfactory. Dissassemble before autoclaving.