Springfield Marine 2-3/8" Locking Table BaseThe Springfield Marine 2-3/8" Locking Table Base is made of black plastic with a 5-3/4" hole pattern that will work with any 2-3/8" post. For use with the Uni-Lock table post.Features: High strength black plastic; 7" Diameter; 5-3/4" Hole pattern; Works with any 2-3/8" post; Warranty: 5 Years