4.125" to 4.205" inch size. Gold in color Comp Cams or Powerhouse Adjustable Tapered Piston Ring Compressors work just like our solid models, except that they incorporate a split down the side and a large hose clamp for adjustment. Perfect for those who will be working on a variety of bore sizes or for those sizes not covered by our standard tapered piston ring compressors. Each model has a range of about .090", so one of these can replace several of our standard tapered style. Hard anodized for wear and color