Stopper Assortments Products for Science Education

Soft, durable, resilient rubber designed for long life.

Rubber Stoppers for 800mL Kjeldahl Flasks

Light tan rubber stoppers

Twistit: Four Stoppers in One Products for Science Education

Multi-purpose and economical

Plasticoid Walter Crucible Holder

Rubber with removable glass stem ground at 45° angle

Plasticoid Neoprene Flask Support

Remains useful even after long exposure to moderate heat

Plasticoid Crucible Holders

Holders for glass crucibles

Walters Crucible Holder Products for Science Education

High-quality holder.

Rubber Stoppers for Kjeldahl Flasks

Light tan rubber stoppers