Red Rubber Plug Stoppers
Straight-Plug Style Design provides maximum sealing for vials with straight wall glass finish. Not recommended for vials with a blow-back feature. Pharmaceutical grade. Natural Red Rubber Pros: good coring and re-seal characteristics Cons: contains dry natural rubber, poor gas and vapor transmission compared to butyl, not appropriate for products that require an inert gas blanket, not good for use with acidic products or solvents. Can be autoclaved and irradiated.