Used Louisville Slugger Z 1000 SB11ZE 34 27 RARE Slowpitch Softball Bat End Load Cardinal Seamlessly attaches to the back White Blue (Tye Dye) Seamlessly attaches to the back of your GoPro to extend battery life Features 15% more battery life than the previous model Perfect for any application where you need extended battery life Compact design keeps your GoPro as small and light as possible LCD window displays battery level or charging status LED light displays recording status Can be charged with most standard USB chargers Thanks to this knob as well as a balanced swing weight its good condition ISF and USSSA written on it (no stamp)