US$ 11.99
and block and tackle
Pairs of lamps
Built for drop-precision dispensing
ten per pack
High-Speed Low-Friction Pulley on Rod, 10" Type_Apron and block and tackleTen inch high speed low friction pulley on a 12mm aluminum rod, pairing a 2 inch plastic wheel with a metal bearing for smooth, consistent rotation in force and motion experiments.
US$ 11.99
US$ 39.00
US$ 39.00
US$ 13.99
US$ 29.99
US$ 19.99
US$ 19.49
US$ 12.49