DIVEPRO FB25 FB51 FB55 FB60 Buoyancy tube Increase buoyancy can be fitted over the battery pack

Hard material, capable of withstanding 150 meters of water pressure without deformation.FB25 Size: external diameter*height*inner diameter=97*70*25mm Buoyancy Force: 420g  Suitable for ball head connecting rodFB51 Size: external diameter*height*inner diameter=97*70*51mm Buoyancy Force: 330g  Suitable for B06 battery packFB55 Size: external diameter*height*inner diameter=97*70*55mm Buoyancy Force: 300g  Suitable for B13 battery packFB60 Size: external diameter*height*inner diameter=97*70*60mm Buoyancy Force: 280g  Suitable for B07 battery pack