Replacement PTFE gland seals for the K24 and K29 vacuum stirrers, four to a pack. The cup seal and O-ring that seal the ø8 mm shaft where it passes through the stopper.
Fits K24 and K29: the shaft seal is common to both joint sizes
Four per pack: a seal per shaft change and spares for the drawer
PTFE cup seal: the gland-packing type seal with O-ring, as fitted at the factory