Hard plastic resin material for high pitched modern version of traditional wood blocks.Pitched so that they have complementary tones(high and low)approximately one minor third apart.Brilliant sound combined with a bold, colorful look makes them perfect for the professional percussionist yet simple enough for the novice musician.Mounts quickly and easily attaches to any 3/8 inch diameter mounting can add this jam block to the drum kit, match it with various brackets, attach a connecting clip, hang it on the cymbal stand or clip it on the kick drum, etc.Product Specification:Material: PlasticColor: Red+Blue, Red+Yellow, Red+Pulple(Option).Size:Drum Block1 : 9cm x 6.3cm / 3.54inch x2.5inchDrum Block2 : 7cm x6.3cm / 2.75inch x 2.5inchPackage Content:1 x Plastic Percussion Block