Internal Only Listing ARNA, Annova Reverberi of North America is a new licensee of ELECTRIC Pressure Washers only, while our relationship with FNA goes back years in the DEWALT line of GAS Pressure Washers. Just as with the DEWALT line, all of the Stanley FNA supplied pressure washers will have an X at the beginning of the model number so begin with SXPW prefix. ARNA pressure washers will all begin with either a SLP or SHP prefix. For a current listing by model: