Made from durable, lightweight laboratory-grade polystyrene, it features a three-layer design with graduated hole sizes for maximum stability. Detachable and portable, it’s ideal for both professional labs and creative DIY projects.

Sizes:
ES.91512.01213 - 12/13 mm Tubes, Hole Diameter is 13.6mm, Holds 50
ES.91512.01316 - 13/16 mm Tubes, Hole Diameter is 16.3mm, Holds 50
ES.91512.01518 - 15/18 mm Tubes, Hole Diameter is 18.7mm, Holds 50