Plug Closure, Flange Cap and Filter Serum Caps

Plug Closures are a snug fitting, inexpensive cap for most 12 mm culture tubes.

Flange Caps offer the most secure seal and fits on 12 and 13 mm tubes. The soft double flange prevents splitting and cracking of polystyrene tubes.

Filter Serum Cap is for use with blood serum filters. The stepped design permits the same cap to fit on the inside of unflared 10, 12, 13 and 16 mm models to provide positive seal for serum storage or transport. In addition, the caps allow closed systems with filter in primary collection tube and 1-size step design fits most serum filters for a positive seal.