To provide strength for your outriggers when installed through your T-top, our TACO Grand Slam Backing Plates are the answer. Designed perfectly to slide over the mount bases of the GS-280, 2801, 380, and 390, these plates will save your T-top from potential damage caused by outrigger torque when extended. Provides strength to the base. Matches existing base hole pattern. No drilling. Dimensions: 6-1/2″ L x 5″ W x 1/4″ T. Sold in pairs.