"bouteille de gaz"

These foam plugs are designed to fit most test tubes and vials.

Size Top Diameter Bottom Diameter

Size 1 11.1 mm 8.3 mm

Size 2 12.7 mm 9.5 mm

Size 3 14.2 mm 10.7 mm

Size 4 15.8 mm 11.9 mm

Size 6 19.0 mm 14.6 mm

Size 20 41.2 mm 34.0 mm

Solid, black stoppers contain a high percentage of pure rubber and weigh less than neoprene.