This is a new PVM 530 46 tooth rear sprocket that will only fit PVM wheels that originally came with PVM's race cush drive.  These sprockets are machined in PVM's unique Y-spoke design from anodized aircraft grade aluminum and anodized black.  These sprockets have an 80mm center bore with a 5-hole PCD of 100mm with 10mm holes.  Sprockets may vary slightly from the picture due to differences in production runs.