Vacuum Pump with 200mm Pump Plate Subcategory_Test Strips polished with ground edges for

polished with ground edges for image-formation experiments in introductory optics

Double-vessel copper calorimeter set with a 75 by 50mm inner cup on cork supports inside a 100 by 75mm outer shell and a slotted lid

Polyhedral 120mL glass alcohol lamp ships with a metal cap and fiber wick for low-temperature bench heating in chemistry and biology demonstrations

Tandem double plastic pulley pairing 38mm and 50mm low-friction wheels on an open-sided steel frame

Vacuum Pump with 200mm Pump Plate Subcategory_Test Strips polished with ground edges forHand operated vacuum pump with a 200mm copper pump plate and rubber seal, a battery free source of partial vacuum for bell jar demonstrations without external power.