inStock

Replacement sleeves are easily removed for cleaning or replacement.

Filter Support Collar is a sturdy, molded rubber filter disc.

Made of molded, black rubber with a conical opening 27 mm at the top tapered to 22 mm at the bottom, the crucible holder includes a glass funnel.

These plastic sleeves slide snugly over any standard size lab thermometer to keep it from rolling off the lab bench.

High Quality for the Classroom.