If you are tired of your PCP fill probe getting dirty, you can protect it with one of our yellow push on caps.  This cap covers the entire probe.

The cover is made from EPDM rubber inside height is 38mm and it will fit a probe that is approximately 9mm thick -- this is what I use on my Hatsan probe, just FYI. 

It should fit many of the fill probe brands on the market and what you want to confirm is the diameter of your probe and that the bottom O-ring is within 38mm from the end of the probe so the cap can cover it.

Pricing is for one full length black cap.  

Fill probes shown are for comparison and are not included.