5-Piece Low-Friction Single Plastic Pulley Set, 50mm Diameter Included_Stopper pairing with a solar cell

pairing with a solar cell to demonstrate the light-electrical-light energy chain during photovoltaic experiments

this fan-shaped nylon brush rides a twisted stainless steel handle flexible enough to bend around difficult interior angles

this 22 SWG bare copper wire on a 250g reel runs about 225 feet — the workhorse fine gauge of the line

and follicular stages from primordial through mature corpus luteum for reproductive anatomy and histology teaching

5-Piece Low-Friction Single Plastic Pulley Set, 50mm Diameter Included_Stopper pairing with a solar cellFive pulley set of single 50mm low friction plastic pulleys on open sided steel frames, letting students snap cord directly into place for faster classroom setup and teardown.