RJ-208000-1 - 3/8 In. Billet Aluminum Tapered Washer (3/8 in. ID x 2 in. OD) SKU RJ-208000-1 Quantity discounts available QuantityPrice Quantity -+ Add to Cart Details 3/8 in. ID x 2 in. OD tapered style billet aluminum washer as found in our Pre-Runner Antirock Sway Bar aluminum sway bar arm set. Details Back Details3/8 in. ID x 2 in. OD tapered style billet aluminum washer as found in our Pre-Runner Antirock Sway Bar aluminum sway bar arm set.