1. Knob type bleed valve, bleeding is very smooth. 2. Features a tight CGA347 nut and nipple for connecting with SCBA (fire fighting) tank. 3. 45mm diameter glycerin-filled gauge reads 0-40 MPa and 0-6000 PSI clearly, ideal for outdoor use. Total Length: 70.5 cm / 27.7 inches Pipe Length: 61 cm / 24 inches Gauge Diameter: 45 mm / 1.77 inches Max Pressure: 5000 PSI Interface Type: 1/8 quick insertion / CGA347 Note: Installation guide not included; professional installation is strongly recommended. Please verify the item specifications to ensure compatibility. Product design may vary slightly between batches, including minor color or appearance differences, which do not affect functionality. Color: Silver Material: Metal Package Contents: 1 x Refill Charging Adapter with 24-inch micro-bore hose Only the above package content is included; other items are not part of this package. Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.