OEM Jupiter JCB-582 / JTU1110, 4 Valve Tuba piston sold as each. D25.5mm x L92mm. Not for JSH-594, those are different part numbers. Contact me if you wish to verify your model's fit or you need other parts.
Part Numbers: #1 42-P010, #2 42-P011, #3 42-P012, #4 42-P013
