"The Mystery of Lyle and Louise"

Glass thermometers with Enviro-Safe Black liquid.

Leak-proof dispensing of liquids.

Individual spherical glass lenses.

Individual spherical glass lenses.

Makes demonstrations viewable by the entire classroom.

Ideal selection for use with a ray box.

Provide a convenient way to illustrate the properties of lenses to students.

Superior Grade Rubber Offers Softness, Resiliency, and Durability.

All Types and Sizes for all Optical Applications.

This replacement high-concentration diamond wheel is six inches in diameter.