Here are a selection of Silicone Rubber O-Rings that fit into our pens.

We are selling these as individual O-rings and not as kits.

The O-Ring replacement process inside a grip or cap can be challenging. You will need some tweezers and some patience. 

A touch of silicone grease should be lightly applied after installation if you have some on hand (a very small amount, almost imperceptible) 

Here is a video link for a P6 O-ring swap which is similar to the inside O-rings on all our parts.