ID the make of this piston

[Kny21]

Anyone know what the internal markings "art l 2" mean as far a brand? Pulling a 65u apart and trying to find out what components where used. Luckily only think I need replace 1 piston.

Pic of the subject.

 

[eastcoastjumper]

That's Oem


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[tomski]

Pro-X brand made by ART.

 

[rowsto]

Protip: oem,pro x, same thing

 

[kevbo]

I have found some Prox pistons with a little more taper than OEM.