Size: 2.5" X .42" X .21" (64.82 X 10.75 X 5.35 mm)
String Spacing: 2.13"
We make our Tone Bars / Ferrule Blocks (tone slugs) out of 360 brass and use them on most all of our string through custom guitars. You will notice an enhancement in sustain and beauty. The ones sold here are not polished. Go to shawwoodshop.com to purchase slugs that are polished. Please ask any questions you might have about the Slug. I offer quantity discounts.