This plotting compass has direction indicated. It has a liquid-filled plastic body with a black base and contrasting markings for clear visibility. It is useful for magnetic demonstrations.
• Stable needle. Size: 1.38″ (35 mm) Dia.
• Sold in a pack of 12
Use this washable plastic tray for performing ABO and Rh blood-typing. The tray has 3 depression wells to facilitate the testing. It is great for biology experiments and demonstrations.
• 3″ (75 mm) L x 2″ (50 mm) W