Lab Quality Magnifying Glass, 2.25x, 2.5" Diameter Pack Size_50 the lower-friction variant of the

the lower-friction variant of the metal-bearing bench-clamp pulley in the series

covering refraction shapes for a complete optics lab kit

this motor-generator pairs a split-ring commutator against slip rings with bulb indicators

Tandem double plastic pulley pairing 38mm and 50mm low-friction wheels on an open-sided steel frame

High-level peroxide test strips in a 50-strip vial calibrated at 0

Lab Quality Magnifying Glass, 2.25x, 2.5" Diameter Pack Size_50 the lower-friction variant of theLab quality 2. 5 inch magnifying glass at 2. 25x with a 5. 87 inch focal length, the optical glass producing undistorted views of specimens, fine print, and inspection details.