30A 125V Sealing Collar with Threaded Ring. This sealing collar provides maximum moisture protection between the cordset and adapter. Designed for use with 20 and 30 amp locking systems. At Marinco, we make electrical products that stand up to the harshest environments. Every product we make is designed to withstand the rigors of life at sea.WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.