New- Benjamin Trail NP2 Piston Seal- Harder Material

Like the Walther seal but has a larger ID hole than normal.

1.141" OD average- regular size

And 1.146" oversized

Please select the seal from the option here.

Some guns may have vary large tubes because of variances of manufacturing and you should

measure before you buy. 

***Update- 7/16/2019

On the oversized version we are using a softer material which will size easier or fit bad tubes better from the start. Better able to work in bad spec tubes.