FOX FLOAT X2 Negative Air Seal Wrench is to install or remove FLOAT negative air spring sealhead. MPN: 398-00-419 - FOX - Negative Air Seal Tool - Suspension Tool. We are out East at 3063 Columbia Ave. - Lancaster PA, 17603 & out West at 3225 Grande Vista Dr. - Newbury Park, CA 91320 & 165 Design Place, #105 - Sparks, NV, 89441.