Strong light and water resistant the blackroll training block makes for a functional training toolideal for storing your blackroll mini or blackroll duoball and ball the block also serves as a higher deck for pinpoint massage to target muscle groups that are otherwise hard to reachif youre into your yoga then the block can also be used for extension support and easier balance in poses as well as elevated seatingmeditation this block measures 30cm x 15cm x 10cmsizes one size