Hi Valley Chemical is your source for both Glass and Acrylic Burette’s. They are a laboratory apparatus used to measure the precise volume of a liquid. Each burette consists of a graduated tube with a stopcock at one end. They feature durable, permanent markings, fine sharp lines, and easy-to-read numbers. The PFTE stopcock eliminates freezing and lubricant contamination. We also carry an economical Acrylic Burette.