PT21 - Gauge - KN/bar PT210001 NATA calibrated and certified gauge with printed dial displaying in kN and bar. American or Australian, your users will always be at home reading the force gauge. PT21 - Gauge - kg/lb PT210002 NATA calibrated and certified gauge with printed dial displaying in kg and lbs force. Ideal for users that share their hydraulic pump with a PT21 and other devices sushc as hydraulic pushing cylinders.