1.Size: According to your requirements or your sample 2.Model: TA, TB, TC, SA, SB, SC, ... .Style: Mechanial seal Truck wheel hub oil seal:1. SIZE: different sizes available2. COLOUR: according to customers3. MATERIAL: NBR, NR HNBR ... : SA, SB, SC, TA, TB, TC, ETC5. PACKING: bags inner and ourter cartons. or card packing,or rollers. and we can according to customers