Test Tube Set, 18 X 150mm with Rack and Stoppers;

A high quality test tube set for scientific, educational, hobby or display use. The test tubes are laboratory grade Borosilicate glass with rims and measure 18 x 150mm (5/8 x 6") The tubes are fitted with #1 rubbers stoppers. The rack is the heavy duty 3-tier design which will provide rock-solid storage for tubes, unlike the ordinary 2-tier design which allows tubes to rattle about. This rack can withstand both autoclave sterilization and sub-freezing temperatures. A high-quality set!