(24) 2"x4"x48" pieces/ (3) TTPRO When used as riser support, PlatFoam Isolation Foam GREATLY purifies the tone of whatever's on the riser and yields dramatically improved isolation characteristics, thus minimizing sound transmission to neighboring spaces. This is a fast, portable, easy and affordable solution to many of your sound isolation problems! Famous folks including Hollywood composers, world-class nightclubs, houses of worship and more are using PlatFoam with great success! Try out some PlatFoam yourself. You'll be absolutely amazed at the improvement it offers!