BCY Crossbow Serving is a great choice to redo that worn out serving on your crossbow. With a diameter of .030 it's the perfect size and gives the durability to hold up. Available in 4 colors including black, red, flo green and tan. It has proven to be tough and very durable. 60X Custom Strings chooses to use this BCY serving on all of our custom crossbow strings. We currently stock all colors in the jig spool size and bulk spools are available on a pre-order basis.