100mL precision bore buret is permanently marked with an individual serial number. Supplied with a Certificate of Graduation Accuracy. Packed complete with a reservoir bottle, U-shaped drying tube, vented connecting tube, rubber squeeze bulb, # 1 one-holed rubber stopper and ¼" I.D. rubber tubing. Stopcock for all sizes is standard 2mm bore size. Scale is durable black ceramic enamel. Calibrated to the accuracy requirements found in ASTM Specification E694. Class A Serialized/Certified. Replacement stopcock is S6445. Kimble #: 17124F-100.