need some info we have 4 pack's and spare bottle's, one tester and all the part's to do a complete over haul. they are 4500 psi bottles we are looking to get sale or trade for some thing useful like msa air pack or a mini pumper. we will also saLE THESE AT FAIR MARKET VALUE. just looking to see if there is any department out there that need air pack's do have pic if need or e-mail me at hfd1213@yahoo.com