According to the Crosman Site:
Rated for 4500psi and constructed with carbon fiber to reduce weight. Includes a stainless steel fill connection, 12" microbore hose, restricted flow manifold for controlled filling, built-in pressure gauge and bleed valve.
Tanks will be in two sizes:
Model Number 81001
Capacity 90 cubic inch
Portable 15" / 90 cu in size provides 5-16 fills. DOT certified.
Model Number 81002
Capacity 342 cubic inch
Standard 38" / 342 cu in size provides up to 80 fills. DOT certified.
The big questions for me were
How much air will the tanks hold at different fill pressures?
Yea, I am kind of weird that way. So I jumped in and figured it out the best I could.
According to my calculations ( your mileage may very )
The 15" 90 cubic inch tank will hold:
10.78 cubic feet when charged to 3000 PSI
12.55 cubic feet when charged to 3500 PSI
14.37 cubic feet when charged to 4000 PSI
16.14 cubic feet when charged to 4500 PSI
The 38" 342 cubic inch tank will hold:
40.96 cubic feet when charged to 3000 PSI
47.69 cubic feet when charged to 3500 PSI
54.62 cubic feet when charged to 4000 PSI
61.35 cubic feet when charged to 4500 PSI
The reason I added the different fill points was I know that some people don't have access to 4500 psi fills. Hope this helps anyone who was curious like I was. If my math is wrong please post the correct numbers