11" High-Heat Nested Stopper

This HI-Heat Silicone Nested Stopper is 11 inches in diameter. The silicone rubber rings are cut from the same stopper, each ring fitting perfectly inside the next. This allows for vacuum tight fit for all openings within stopper size range. Ideally suited for glassblowing operations and chemistry labs, these nested stoppers made are made of red silicone rubber and are suitable for higher temperature applications with a serviceable temperature range from (-100f) to (+450f). These stoppers are resistant to hot oils, fuels, oxidizing chemicals, sodium hydroxide, and ozone gas.