Made from precision, uniform Schott DURAN® true-bore tubing to ensure the stipulated capacity tolerances, these burettes feature durable, permanent markings, fine, sharp lines, and large, easy-to-read numbers. Supplied with PTFE stopcocks to eliminate freezing and lubricant contamination and to provide a precise fit within the barrel. The noncorrosive, molded retort stand provides an excellent replacement for metal ones. Even the metallic rod has a polypropylene cover to make it noncorrosive. The rod can be threaded into the heavy base, giving way to a perfectly stable retort stand. The white finish double burette clamp is made of die-cast aluminum and painted white. Black rubber sleeves allow for firm gripping of burettes. The clamps are adjustable and hold two burettes from micro to 100 ml sizes. Thumb-style screw key attaches easily to support rods. Kit includes two Class A burettes, PTFE stopcocks, a 2 mm stopcock bore plug, a burette retort stand, and a double burette clamp with white finish.