100mL Tube, Reaction, 14/20 Inner Joint, 2mm Glass Stpk, Airfree, Schlenk. Cylindrical shaped tube, similar to AF-0537 but with an standard taper inner joint, useful for simple reactions. Available with a choice of a 2mm high vacuum glass stopcock having a Stainless Steel constant pressure retaining device or a 0-4mm Chem-Cap Airfree inlet valve.