Pearl's Elite Concert Wood Blocks are sold individually and are pitched in "thirds" offering a low, medium and high pitch. The blocks are made from a blend of hardwoods and can be played handheld, mounted or on a trap table. Each block includes a mounting bracket and the low and medium pitched blocks can be mounted from the middle or end. The smaller high pitch block can only be mounted from one position. The mounting bracket will accept a 3/8" post.