10% Food Grade Peroxide Test Strips, 50-Vial Waves & Oscillation_Sound & Resonance Polished beech wood test tube

Polished beech wood test tube rack with twelve vertical holes sized for tubes up to 28 mm diameter

5 inches of nylon bristles for scrubbing glassware up to 4 inches in diameter

supporting skeletal anatomy teaching in health coursework

Hand-driven Newton's color disc that spins seven painted segments fast enough to merge into apparent white through persistence-of-vision and additive color mixing

10% Food Grade Peroxide Test Strips, 50-Vial Waves & Oscillation_Sound & Resonance Polished beech wood test tubeFood grade peroxide test strips in a 50 strip vial calibrated for the 3 to 10 percent concentration range, with a 0 to 20 second reaction window for sanitation and food safety checks.