Standard polypropylene spigot (1-1/8" - 12 straight female threads) for Nalgene® carboys; accepts 5/8" (16mm) I.D. tubing. Also includes HDPE tubing adapter which takes tubing with 1/4 or 5/16" (6-13mm) I.D. Use Cat. No. 7-6432 for applications with selected solvents and other chemicals where PP spigots are unsatisfactory. Autoclavable. Dissassemble before autoclaving.