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 an easy and inexpensive way to keep your marker in top shape by swapping out your o-rings. Note: The product image associated with this item is a sample only. Your will receive the kit for your specific marker that you order which will contain the o-rings needed for that marker. Includes the following o-rings multiplied by the number of rebuilds in the kit: Ram Housing to Back Cap Mainbody to Sol Manifold x2 Grip Frame to Mainbody Ram Shaft to Pillow Bolt Cam Drive ASA to Grip Mainbody to Sol Manifold Mainbody to Sol Manifold Mainbody to Sol Manifold Ram Housing to Gas Interlock Inside Mainboyd to Inline Reg Ram Shaft Bumper Refill Plug inner Ram Shaft outside x2 Inline Reg to Mainbody Gas Interlock Button outside Inline Reg Spring Follower outside Ram Housing inner Pillow Bolt outer Inline Reg Piston outer Inline Reg to Inline Reg Base Volume Chamber inner Volume Chamber to Mainbody Ram Housing to Volume Chamber Ram Housing outer x3 Refill Plug inner Pillow Bolt to Vol Chamber