This "Fat" brass big block will add mass and sustain to your Floyd Rose bridge along with the tonal qualities of brass. Works with Floyd Rose Original, Non-Fine Tuner, 7-String*, 1000 Series*, and Special* tremolo systems. Width is 50.15 mm and thickness is 12.90 mm.Brass has been a much desired material for guitar luthiers dating back to the invention of the instrument; it is notorious for increasing warmth and clarity simultaneously, a rare combination. While greatly strengthening chord clarity and beefing up individual tones, it also greatly improves resonance, especially in the midrange of the instrument. All of these improvements are accompanied with the undeniably vintage sound and feel of this time-tested material.Since this block is larger than a conventional sustain block, it can also limit upward travel of the tremolo and can be set to rest against the body in a blocked bridge configuration. For floating bridge setup this block may require some routing in the spring cavity.*The Special 7-String Tremolo Systems have a sustain block mounting hole spacing which is unlike any of our other systems - for this reason, they can only function with their factory installed sustain blocks. These blocks will NOT function on the 1000 Series Pro 7-String!