Industrial Magdeburg Hemisphere Suction Cups, 3.25", 100N Graduations_Blue using metal bearings to minimize

using metal bearings to minimize friction in uniform-acceleration and Newton's-second-law work

suspending thermometers above hot plates or fixing specimens in orientation

this universal clamp holder accepts rods up to 20 mm in diameter and bolts securely to retort stands for oversized load support

high-temperature grid flame for chemistry ashing

Hand-operated vacuum pump with a 200mm copper pump plate and rubber seal

Industrial Magdeburg Hemisphere Suction Cups, 3.25", 100N Graduations_Blue using metal bearings to minimizeHandled 3. 25 inch Magdeburg hemisphere suction cups with release stubs, holding under at least 100 Newtons of separation force after hand evacuation of the air between them.