AFTCO guides and tip-tops are designed and built to provide consistently flawless performance over a lifetime of fishing. The bearings, pins, rollers, screws, etc AFTCO produces today, while continually undergoing improvement in features and materials, are designed to fit perfectly into their proper AFTCO guide or tip-top, regardless of its age. You can order all replacement parts individually, but since the difference in size between like parts is small, they can easily be mistakenly interchanged. To avoid this, we suggest that you order complete assemblies, which include the roller, pin, bearing (with AFLON lifetime lubricant) and screw, already assembled.