With 1" (25.4mm) riser clamp area. Top clamp used to place the instrument gauge right under your eyes. Compatible with the stock M8 Softail digital gauge or KOSO D2 aftermarket gauge in combination with Kraus Topless Isolated Risers 704030 (8"), 704034 (10") or 704033 (12" rise). Will also fit all other Kraus Isolated risers that has the stock top clamp exchanged for this top clamp. - For 1" (25.4mm) handlebar clamp area - CNC machined billet aluminum - Black anodized finish. Note: When required a Plug & Play 32" (81cm) long instrument wiring extension is optional available as 984621.