New Genuine PAI Air Compressor Piston Ring Set P/N DRS-4050-030. 

Alternative and other replacement reference part numbers:  Bendix 225517.

Description:  Use with Bendix Tu-Flo 500 Air Compressor 0.030 Size(Use w/DPA-4040 Iron Piston)(5 Rings, Incl: Rings for 2 Pistons).
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*PAI p/n DRS-4050-030 is #28 with the red square in the above diagram.  Other parts sold separately, please email for quote.

Please contact us via email if you have any doubt about what parts you need, or please contact your local OEM dealership for correct part # to ensure correct part. 

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We're an authorized dealer of PAI and Excel products, please let us know if there is any other parts you might need, thanks.