The sustain block is the brass mass that hangs below the base plate and ties the string saddles to the spring claw. When one cracks, strips its string-lock threads, or gets swapped out as part of a tuning-stability fix, this is the part that goes back in. This is the Floyd Rose Original replacement block, part number FROTB32P, made from nickel-plated brass and sized at 32mm.

Before ordering, measure your cavity clearance and check your base plate's mounting screw pattern. The block has to clear the body cavity through the full range of travel — too long and the block bottoms out before the bridge finishes its dive; too short and the springs sit at the wrong pull angle and the bridge will not return to pitch reliably. The screw pattern has to match the Original series base plate this block is designed to bolt to. If you are fitting it to a licensed or non-Original Floyd Rose base plate, confirm the pattern before ordering.

The block is nickel-plated brass. Brass is denser than the zinc alloy used in some OEM blocks, which tightens the attack slightly and extends sustain. That is a character difference, not a fit consideration — it does not affect whether the block physically clears the cavity or mounts to the plate.

If you are not certain this is the right block for your guitar, send us the make, model and year and we will check it against what we know.