Best Seller! Safe and Unbreakable! 
 
This test tube rack is sturdy and non-slip, perfect for safe classroom lab experiments. 
Includes 15 safe, unbreakable test tubes with screw lids and 1 rack holds up to five Safe Tubes.
Capacity: approximately 50 ml (1.75 oz.). 6 in. L x 7/8 in. dia.