4500Psi Aluminum Air Bottle, 30 Mpa Explosion-Proof Aeronautic PCP Cylinder, M18 * 1.5 Refillable High Pressure Tank for PCP Scuba Game(Empty Tank)

This bottle came on time and is very well made. It is a heavy gauge aluminum and it fit the valve set I bought. I used the "Aopkeo Fill Station Adapter Valve 4500psi for Airsoft PCP Paintball HPA Cylinder Tank Bottle (M18*1.5)" from here on Amazon, and it fit well and sealed. Very happy with this purchase for topping up my Barra 250Z PCP in the field. Great product for the price !!

Great quality and exceptional value in customized airgun applications.

So far, holding pressure. Threads and O-ring cut are sized well. Appears to be well-made. The pressure rating stamping is a bit shallow and difficult to read (fairly visible under angled lighting), but I have no objections. I used the "Aopkeo Fill Station Adapter Valve 4500psi for Airsoft PCP Paintball HPA Cylinder Tank Bottle (M18*1.5)" from here on Amazon, and it fit well and sealed. Once I tightened down the Aopkeo's fill valve snugly, the whole works has held pressure rock steady at nearly 4,000 PSI for a couple of weeks. I've only had it up to just over 4,000 PSI (Aopkeo's pressure gauge reads just under 4,000, my pump says nearly 4,200), but that is about all I plan to fill it to. It's a metal tank - they did not appear to screw it up.

For what it's worth, it's good. But heavy.

I bought 3 of these tanks as I have the 177.22.and getting the 25 cal when it's in stock. These are really great and the price is super low but people don't be stupid like me as it takes forever to fill with a hand pump get a hp compresser I did how ever change the rubber rings that came with it to just 2 thick ones and people no leaks at all. Remember get these along with a hp compresser not a hand pump unless you want a work out. If you want to buy a tank/barrel brace you will need the large 63mm size for the tank but this is really worth the buy. Thank you to seller.