1Fitment: This magnetic oil dipstick is replacement for Predator 3500 Watt Gas Inverter Generator. Please check whether the model is suitable before buying. 2Practical Function: Magnetic dipstick can help your crankcase cleanout foreign substances, preserve your inverter generator by keeping metal out of the engine. 3Unique Design: Industrial strength magnetic tip collects metal shavings floating in your generator's oil tank, and the flame resistant O ring seals could extend generator life. 4Premium Material: This magnetic oil dipstick body is made of premium aluminum material, which is durable and can be used for a long time. And the round rubber ring is heat resistant, ensuring perfect sealing. 5Fine Workmanship: Professional manufactured, exquisite workmanship with unique design, ensure stable performance and high reliability.