18.24mm (.718) spacing and is adjustable. Top load/string thru! Direct price: $110.50 from Best Bass Gear (before shipping) Yours for only: $75 shipped. FOR SALE ONLY. (Maybe trade for a Boss ODB-3) New Black & Brass top model from Hipshot: I have no use for this, moved on to 5'ers. This is brand new. No mounting screws. Thanks for looking. Paypal only.