Emergency Deck Fill PlugNitrile-Buna RubberThis Emergency Deck Fill Plug is a must for any vessel. Fits most 1-1/2" hose deck fills in the event you lose your cap. For temporary use only until you can replace your OEM cap. Constructed of fuel resistant Nitrile-Buna rubber. WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.