The model 1209 Jam Block joins the existing blue high-pitched Jam Block and our red medium-pitch Jam Block. These are popular percussive add-ons that simulate a range of wood block effects-without the worry of hairline cracks and chipping so common in old wood blocks. Crafted of Jenigor, LP's exclusive plastic formulation, these blocks can be played quietly with rods or mallets, or hard with sticks and they will not crack or splinter. They are modern versions of age-old favorites.