Hello chaps I have a question for you,please can you tell me the material for the valve seal. I have delryn (rin?), polyurethane and PTFE bar. I have had conflicting advice hence the question. I got some seals for a 160 Crosman from the states and they were made of something that was clear. Don't know what that was, seemed to be soft.
Thank you.
Cheers.
Geoff.