[ Compatible with ] : Predater 3500 Watt Inverter Generator. [ Material ] : Made of heavy duty metal with strong durability. The crisp knurling design of the product surface can be effective anti-skid.Provides a very strong grip [ Easy to install ] : Each time you replace, just remove the metal scraps on the magnet, re-insert the dipstick can be repeated use. [ Function ] : Industrial-strength magnetic tip collects metal shavings floating in your generators oil tank, Preserve your inverter generator by keeping metal out of the engine [ Package included ] : 1pcs Magnetic Oil Dipstick