Pistons - .040 - 44ci  Ouincy?  (2) unfinished pistons.  OD has been turned to 2.597.  They are small pin and 3 ring design.  Dome is the same as any other 44ci style piston.  They may be Quincy.  You may be able to use Wiseco 40 over rings.  These pistons would be great for a Merc 200 mod motor.  They are marked 2.598 & I get 2.597.  1 Set of 2 Available