Density Set - Black Derlin, Set Of 12 Derlin Cylindrical Bars Of Different Length But The Same Diameter, Students Learn That The Density Of A Substance Is Constanteven As Its Mass And Volume Change. Comes In An Attractive Wooden Holder.
Pulley, Single Sheave, Pulleys wheels are made of plastic and mounted securely in an aluminum housing with a hook on both the top and bottom for suspension, Size: 50mm