The sustain block bolts to the underside of the base plate and anchors the tremolo springs. This is the Floyd Rose Speedloader-series block, part number FRSLTB30P, made from nickel-plated brass and measuring 30mm in length. It is a direct replacement for the block on a Speedloader-equipped bridge — not a generic block, and not a fit for a standard Floyd Rose base plate.

Block length is the critical dimension. Too long and the block hits the bottom of the cavity before the arm completes a dive. Too short and the springs pull at the wrong angle, and the bridge will not return to pitch reliably. At 30mm, this block suits a specific cavity depth. Measure your existing block before ordering — if the number does not match, this part will not work regardless of how close everything else looks. The mounting screw pattern must also match your Speedloader base plate exactly.

The block is nickel-plated brass. Brass tends to produce a fuller low-end attack than zinc or steel blocks of the same geometry. That character difference is real, but it has no bearing on whether the block fits the cavity or the base plate — those are the dimensions that decide the order.

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 have on the shelf.