Gas Lift Mounts and ball studs are constructed of 304 stainless steel. Used for mounting gas filled lift springs. Installs with #10 RH fasteners (not included). 10 mm ball.GAS LIFT MOUNT (SEA-DOG LINE)SKU: 35514321655$3.50PriceQuantity*Add to CartFeaturesTypeGas lift ball stud - 10mmMtg Hole-FinishStainless Steel