Copper hook masses Respiratory System Model Precision Crafting: All beakers are

Precision Crafting: All beakers are graduated with metric increments

Premium Quality: Multi use stationary tray is made of high quality

This 22-layer/11-layer model (two complete turns of the double helix) is designed for self-assembly

Simulation demonstrates the Hearing Sense

Copper hook masses Respiratory System Model Precision Crafting: All beakers areSet of nine weights includes: 10g 20g 50g 100g 200g 500g 1000g. These weights feature flat countersunk bottoms, with a double ended hooked rod through the middle. They can be used on balance pans, as well as hooked in tandem for lever arm studies. Weights are made of polished brass and come in a storage block. Premium Quality: Kit is made of high quality, heavy duty and durable materials. Designed for use in professional laboratories but is an ideal