1.deluxe pencil type SMT 1163 Ball Gauge 2.metal head and body, 4side plastic bar. Product Modeldeluxe pencil type SMT 1163 Ball Gauge.Type of Materialmetal head and body, 4side plastic barCalibrated1-20 lbs Scales selectionbar.kpa.kb/cm2.psiOthercan measure the pressure of volleyball, basketball, football, with needle or not .