5-Piece Low-Friction Double-Tandem Plastic Pulley Set, 38 and 50mm Plastic Labware_Plastic Measuring Cylinders Sturdy wooden pulley simple-machine model

Sturdy wooden pulley simple-machine model with multiple pulleys mounted in series and parallel

Complete set of sixteen tooth-type models at 2x life size supports full-dentition dental anatomy teaching

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

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

holding a 20mm candle steady for thermal-expansion

5-Piece Low-Friction Double-Tandem Plastic Pulley Set, 38 and 50mm Plastic Labware_Plastic Measuring Cylinders Sturdy wooden pulley simple-machine modelFive 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.