Function and Applications
Rubber stopper to DIN 12871 with 1 hole 5 mm.
Equipment and technical data

of elastic natural rubber
good resistance opposite acids and bases
color: red
lower diameter: 17 mm
upper diameter: 22 mm
height: 25 mm
diameter of the hole: 5 mm
fitting for:

test-tubes 18 x 180 mm and 20 x 180 mm
devices with standardised conical socket SB 19