H-B DURAC 1.150/1.300 Battery Hydrometer with Siphon Set (B61809-0200) DURAC battery hydrometer is used for determining the specific gravity of battery acid; individually serialized and features a wax paraffin and steel shot Range: 1.150 to 1.300; divisions: 0.005; length: 165mm (6.5in); accuracy: 0.005 Sp. Gr.; Temperature of Standardization 77F/77F Supplied with a siphon set which contains a glass tube with plug and rubber suction bulb installed on the upper end and rubber nozzle with clamp for lower end Rubber parts are made of nitrile, a synthetic rubber that is more chemical resistant and more durable than conventional rubber Tested and calibrated in our exclusive triple accredited/registered ISO/IEC 17025:2005, A2LA accredited laboratory against equipment whose calibration is traceable to NIST and DKD/PTB