"Ward's® Thermochemistry In The Bag Inquiry Demonstration Activities"

Bag of 100 corks of various sizes.

Convenient assortments of various sizes of rubber stoppers are sold as one-pound bags.

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

These lightweight and durable polypropylene stoppers are acid proof and autoclavable.

Versatile neoprene stoppers perfect for every laboratory.

These stoppers are made of a superior grade of rubber that has softness, resiliency, and durability.

A superior grade of rubber that has softness, resiliency, and durability

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