Home » headsets » internal cable routing » c525a-1 INTERNAL CABLE ROUTING HEADSET C525A-1 IS52/28.6 I IS52/40 Alloy Cap Sealed Bearings Top Nut: 1-1/8" to 1.5" Top Cover O.D. 65mm Bearing O.D.: 51.8 Crown Cone: 39.8 Height: 11.5 Technical Diagram