The ultimate in paintball o-ring kits, the Box O-ring Kit comes packaged in a clear, plastic divider case with each o-ring size in its own compartment. This enables the user to quickly switch out an o-ring without having to size any o-rings up to the sizing chart.  Your marker can fire thousands of rounds every week, puts up with the beating of countless rainy Sundays, and withstands a number of slides through the dirt and mud. Through all of this, you still expect your marker to perform week in and week out. A small bit of maintenance is key to ensuring that your marker functions and performs at its best.  One major aspect of marker maintenance is replacing your o-rings. The o-rings in your marker wear down over time by withstanding thousands of cycles along with coming in contact with dirt/debris. Our kits provide and easy and inexpensive way to keep your marker in top shape by swapping out your o-rings.