1,ordinary: P6000(MDI lactone)(Parker p6000 material formula improvement, K Grade), the main oil seal material of other manufacturers on the market is basically P600O;heat-resistant110°limit temperature 120°;(Cost16w/ton,low loss rate)

2,high missile,upgrade: PPDI (polyurethane), used in military missiles;High temperature 150° limit temperature 170°;Its resilience is 30% higher than P6000 material, and its wear resistance is twice that of P6000 materialThe cost is 60w/tonthe loss rate in the manufacturing process is 30%-50%,the larger the modelthe higher the loss rate); The hardness of the main oil seal is 96°for the highest hardness standard,but it feels softer;The hardness of other oil seals on the market is basically 95°and thefeel is hard;Dirk 230 Main Oi Seal Borise DKO  Double Standard.