Brass rollers are the most popular for a reason, they sound warmer with beautiful classic bell tone highs that are excellent for all types of music. These new rollers are easy to change and sold individually so you can order as many as you need.
The standard sized rollers are designed for strings up to .046. For CAM systems, any string larger than that should advance to the larger 5302 roller, as well as use two 8413 heavy springs and at least one if not two 9408 wide string hooks to get the right tension and sturdiness needed for the heavy sets.
Fits all 6, 7, 8, 9 and 10 string Kahler CAM operated tremolos which includes the Professional, Hybrid and X-Trem tremolos and fixed bridges. Models include: 22xx, 23xx, 33xx, 42xx, 43xx, 72xx, 73xx (xx= any number). Also the 2520 "Traditional" fulcrum system.
Here is a video comparing the tone difference between the different types of rollers: New Teflon/Glass string rollers for Kahlers. Incredible tone difference!