Alliance Nylon Baseball/Softball Safety Base Centre PinALLIANCE NYLON SOFTBALL SAFETY BASE CENTRE PIN The Alliance Nylon Softball Safety Base is designed to keep both runners and fielders safe on the diamond by utilizing two separate areas on the base to help keep the runner and the first baseman out of each other's way. The double base is placed so that the white part of base is placed in fair territory and the yellow in foul territory. Thanks to the soft poly foam inner core hitters can slide into the