All mm

28mm patented granite block.

It is designed to enhance and strengthen the sound of your tremolo-equipped instrument across the entire audio spectrum. These blocks are crafted from Volcano Black Absolute Granite, the compression strength of which is 19,000 psi/130,000 kpa and the tension strength of which is 700 psi/4,800 kpa; this is the 4th densest material on earth, just behind Diamond, Carbon and Quartz! Comes with stainless steel sustain block mounting screws and grounding wire.

 

32mm patented granite block.

It is designed to enhance and strengthen the sound of your tremolo-equipped instrument across the entire audio spectrum. These blocks are crafted from Volcano Black Absolute Granite, the compression strength of which is 19,000 psi/130,000 kpa and the tension strength of which is 700 psi/4,800 kpa; this is the 4th densest material on earth, just behind Diamond, Carbon and Quartz! Comes with stainless steel sustain block mounting screws and grounding wire.