It is part #S536.

Thanks

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I thought I saw, but it looks too thick to fit into the groove. Have you replaced yours?

I was assuming you were referring to that gun but maybe you weren't.

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Where I'm learning to shoot FT - come check it out!

CASA Member - California Airgun Shooters Association: http://socasa.org

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Casey has correctly identified the springer ones. if tx/pro sprt it is
AS568A dash # 108. there is another reference # 5308t166.

these are hard buna, 90d. you may also want to try the same size in 75D Viton since it has a higher heat tollerance.

Ive never ordered from them before. I don't like how they don't quote the shipping but I'm hoping it's not too bad since they are in SoCal. Joining the springer ranks.

******************************************
Where I'm learning to shoot FT - come check it out!

CASA Member - California Airgun Shooters Association: http://socasa.org

CASA on Twitter -http://twitter.com/socasaft

they are very fast shipping. I don't remember the cost but it did not raise my eyebrows.

not sure about the 510.