1. Knob type bleed valve,bleeding is very smooth. 2. It is using a tight CGA347 nut and nipple for connecting with SCBA(Fire fighting) tank. 3. 45mm Diameter glycerin filled gauge that read 0-40 Mpa and 0-6000 PSI gauge clearly,ideal for outdoor use. Total Length:70.5 cm/27.7Inch Pipe Length:61 cm/24Inch Gauge Diameter:45 mm/1.77Inch Max. Pressure:5000 PSI Interface Type:1/8 Quick Insertion/CGA347 Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Colour:Silver Material:Metal Package Contents: 1 * Refill Charging Adapter With 24Inch Micro-bore Hose Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.