Sparger tube with ACE frit at bottom. Top has Easy Action Stopcock. The 90 degree side arm comes with a #7 Ace-Thred which promotes the use 5853-06 Ace-Safe connector. The 10 mm O. D. spargers will fit inside #11 Ace-Threds. Threaded versions supplied with 5029-10 nylon bushing and FETFE O-Ring.