Size 00 - Neoprene Stopper w/ Hole - 15mm tapering to 10mm
Green neoprene rubber stoppers have better aging characteristics than those of natural black rubber bottle stoppers and are resistant to oils, solvents, ozones and many hydrocarbons. The serviceable temperature range is from -40°F to +212°F. Neoprene rubber stoppers with 4mm hole to fit 1/4" swivel, 1" long.
Ratings & Reviews
Good for Blowtubes
by Matt J -
I use 14mm for Blow-tubes but 12mm works well also. These can also help hold the air in to help the glass keep shape. Careful not to heat an enclosed vessel as it could explode.