"The Mystery of Lyle and Louise"

Superior Grade Rubber Offers Softness, Resiliency, and Durability.

Versatile neoprene stoppers perfect for every laboratory.

One Pound of One-Hole Rubber Stoppers in Various Sizes.

An outstanding advance in rubber stoppers, four stoppers in one reduce inventory confusion and cost.

These stoppers are made of 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.

One Pound of Two-Hole Rubber Stoppers in Various Sizes.