Big Boy Hose Monster Test Kit - 100mm (4") NHT w/ Gauge
https://www.wfrfire.com/shop/710005524-big-boy-hose-monster-test-kit-100mm-4-nht-w-gauge-5978
https://www.wfrfire.com/web/image/product.template/5978/image_1920?unique=13bec01
Gauge Calibration Certificate is not included in price