Metric means reading in meters Length Meter for wire, cable, hose, rope, tubing Specification: Measuring diameter range: Option 1between 1/16″ and 3/8″ Option 2between 1/16″ and 3/4″recommended between 3/8″ and 3/4″ Option 3for custom diameter between 1/16 “and 3/4”, not drilled guide plastics Option 4for custom diameter between 1/16 “and 3/4″, not drilled guide plastics only.Meter not included. Pulling speed: up to 500 feet/min Length resolution: 4″ 10cm Length measurement error: 1% Reverse count function: yes Operating temperature: between 40F and 120F Overall dimensions:6″ x 6″ x 6″ Weight: 3 Lbs Click below to see our length meters Electronic US Standard/Metric 3/8″, 3/4″ and custom diameter 1-1/2” US Standard / Metric Digital Heavy Duty