BRAND:DUAL CURVEPART NUMBER: 4048APPLICATION:VACUUM LIFT ACTIVATED WHILE RUNNING GASOLINE ON A DUAL FUEL SYSTEM WITH CA100, CA125, 200M, CA225, CA425 AND CT425 MIXERSPURPOSE:LIFTS AIR VALVE TO ALLOW UNRESTRICTEDAIRFLOWTHROUGH LPG MIXER WHILE RUNNING GASOLINENOTE:THIS UNIT IS NO LONGER IN PRODUCTIONMOST ORDERS SHIP IN 2-10 BUSINESS DAYS, FREE SHIPPING TO THE 48 STATESBe sure to add me to your favorites list!Check out my other items!Sign up for PayPal; the fast, easy, and secure way to pay online.