PPD02CF-XPPB Zenner Positive Displacement Meter 5/8 in x 3/4 in No Lead Meter Zenner Positive Displacement Water Meters utilize a magnetically driven, positive displacement, oscillating piston design. It is designed to measure clean potable water where flow is in one direction only in residential, commercial and industrial settings.Size : 5/8 in x 3/4 inLength : 7 1/2 in