US$ 289.50
Tandem double plastic pulley pairing 38mm and 50mm low-friction wheels on an open-sided steel frame
compatible with dilute acids
landing it back in the same barrel as the car rolls forward
Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed
and raised-graduated for shatterproof bench use
Dicot Root Transverse Section Model, Hand-Painted Glassware_Glass Beakers Tandem double plastic pulley pairingHand painted dicot root transverse section model exposes epidermis, cortex, endodermis, and vascular cylinder for plant anatomy and absorption teaching.
US$ 289.50
US$ 120.00
US$ 185.00
US$ 130.00
US$ 22.00
US$ 117.50