Function and Applications
Rubber stopper to DIN 12871 with 1 hole 7 mm.
Equipment and technical data

of elastic natural rubber
good resistance opposite acids and bases
color: red
lower diameter: 29 mm
upper diameter: 35 mm
height: 30 mm
diameter of the hole: 7 mm
fitting for:

narrow neck flasks 200, 250, 300, 500 ml
wide neck flasks 50, 100 ml