... -plated zinc head, metal tube 3.2 or 4 side plastic bar 4.Pressure range: 10-50 ... psi Pencil tire gauge·Chrome-plated zinc head, metal tube·2 or 4 side plastic bar·Pressure range: 10-50 psi ... Tire Air Pressure Gauge Pen, pen tyre gauge, plastic bar, 0-100psi, SMT1161