5-Piece Low-Friction Double-Tandem Plastic Pulley Set, 38 and 50mm Plastic Labware_Plastic Measuring Cylinders this heavy-duty bosshead holds a

this heavy-duty bosshead holds a support rod and a perpendicular rod in a rigid screw-adjustable grip

Stabilizer-free Bunsen burner runs on natural gas for routine heating in chemistry and biology classroom laboratories

5 inch Alnico horseshoe sits between the 1

Two-hundred-fifty-gram push-pull balance in an acrylic tubular body

5-Piece Low-Friction Double-Tandem Plastic Pulley Set, 38 and 50mm Plastic Labware_Plastic Measuring Cylinders this heavy-duty bosshead holds aFive pulley set of tandem 38mm 50mm low friction plastic pulleys on open sided frames, equipping a class for dual diameter compound pulley experiments without cord threading setup.