this autoclavable stand is perhaps the most commonly used Test Tube Stand in?various laboratories. For bet ter visibility, this 6 place rack is end suppor ted by 2?columns. The top plate has 2 holes for holding 25 mm dia test tubes, four holes to?hold 16 mm dia tubes where as the base has corresponding hemispherical wells. It?also has six ver tical pins for drying tubes.?Material : Polypropylene