1、Applicable Model: Piston rings set is replacement for Evinrude Outboard 85 to 300 Hp Engine, please confirm whether your model is applicable before buying. 2、OE Number: The part numbers for reference are 394930, 0384539, 0394930, 0385661, please confirm whether it is consistent with the OE you need. 3、Wear Resistant: Outboard piston rings are made of durable and wear resistant materials to ensure their stability and durability under high load conditions. 4、Premium Replacement: For retrofitting and replacing aging and damaged piston rings, and getting your engine back to optimal performance in a short time. 5、Easy Install: Piston rings are designed to be easy to install and remove, perfectly matched to your model, installation does not require professional skills.