Made from long lasting neoprene rubber, oil resistant, Use up to temps of 250°F / 120°C , Pack of 10 Pack of ten #7 stoppers made of solid, long lasting neoprene rubber. Blue color. Manufactured according to sizes recommended by ASTM standards . Rubber stopper 35mm (solid ,1 hole, 2 hole) | Malaysia Neoprene ASTM One Hole Stoppers For Flasks And Bottles STOPPER RUBBER #11 1 HOLE 30MM B X 34MM T PK10 - Perth Scientific Laboratory Stoppers Stopper measurements: 30mm Bottom, 37mm Top, 25mm Length Durable blue neoprene stoppers with 1 hole (5mm dia). ASTM size #7, oil-resistant, use up to 250°F. Pack of 10. Ideal for sealing and lab use Holes measure 5mm each Blue neoprene ASTM stoppers with 1 hole.
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