Thank you for viewing! Instant purchase OK (•ᴗ•)/ Please check the profile and product description before purchasing! Basically, items will be shipped without a box (package). Thank you for your understanding. Product Name: Packing USH Type Material: Nitrile rubber Color: Black Inner diameter 23.5mm x Outer diameter 31.5mm x Thickness 5mm [Mineral oil resistance, abrasion resistance] Nitrile rubber, which is a rubber material for oil seals, has excellent mineral oil resistance, as well as a good balance of mechanical properties such as abrasion resistance. *This product has not been confirmed to be installed on the main unit. Please purchase with your understanding. *We are not responsible for any damage during shipping. Please understand. #Moa's Product List Here ✨☜ ◎Please purchase with the understanding that this is a home-stored item. If you are a nervous person who is concerned about minor details or if you are looking for a perfect product, please refrain from purchasing. Othmro USH type packing Inner diameter 23.5mm Outer diameter 31.5mm Thickness 5mm 1 piece packing Made of nitrile rubber Black black Kuro black Automobile camshaft axle Bearing camshaft Corrosion resistance Insulation packing