The MTC Bio T8750 DuoClick Two Position Screw-Cap Culture Tubes, 5mL, 12 x 75mm, Non-Sterile, Pack of 1000 (Tubes and Caps Packed Separately) feature a unique, patent pending screw closure system. DuoClick tubes completely eliminate the excess force, splashing and general frustration of traditional snap-cap culture tubes. The advanced cap design includes two distinct positions for aerobic and anaerobic culturing. Rotate the cap 1/4 turn to the first click to secure the cap in the aerobic position; rotate it another 1/2 turn past the second click for a leakproof, airtight seal for anaerobic culturing.

The T8750 DuoClick polypropylene tubes can be centrifuged at up to 4,000xg.