Rettberg® reaction tube, 50 ml, with PTFE valve passage 0-10 mm, total length 215 mm

Outer-Ø 50 x 7 mm Reaction tube, thick-walled, 50 ml, with adjustable PTFE valve passage 0 - 10 mm and lateral sleeve NS 14.5/23, complete with transition piece core NS 14.5/23 to olive 10 mm and ground joint clamp, total length 215 mm, outer-Ø 50 x 7 mm, borosilicate glass 3.3