Vacuum Pump with 200mm Pump Plate Subcategory_Test Strips Two rectangular slots accept square

Two rectangular slots accept square or round rods up to 16 mm in this aluminum alloy multipurpose clamp holder

Twenty-centimeter steel helical spring paired with 2kg

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

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

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 Two rectangular slots accept squareHand 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.