The capacity tolerance on these burets is established by ASTM E287 and they are calibrated in accordance with ASTM E542. Tips are carefully drawn from accurate bore tubing to insure proper drainage rates. This buret has colored markings fine sharp lines and large easytoread numbers. The stopcock barrel has a smooth microfinish to assure leakresistant performance. Each buret is supplied with a dust cover. All sizes are furnished with a 2mm bore stopcock plug.