Features: Aluminum alloy, the implemented in every component each part. suitable for commercial use in, and kerosene metering. There is a special adjustment port, the amount of oil output when screwed to the left decreases, and the amount of oil output when screwed to the right increases. The mechanical gear rotates, the quality has undergone multiple inspections, and accurate measurement；4-digital subtatals, 8-digital totals, easy to read and install proofreading. There is a special revolving wheel,can be cleared by turning the gear clockwise. The oil gauge, please pay attention to the tightness. A gasket or tape is required to tightness. Specifications: Nominal diameter (diameter): 1.0 inches Product form: mechanical Burst pressure: 400Psi/28Bar Working temperature: -10~50℃ Package Includes: 1 x Mechanical Meter note: 1.Due to manual measurement, please allow a difference of 1-2cm 2.Due to different displays and different lighting, the picture may not reflect the actual color of the item. Thank you for your understanding