Air Filter O-Ring Set $6.99 Quantity discounts available QuantityPrice Quantity: -+ SKU: HPI15415 Out of Stock ABOUT THIS PRODUCT:Air Filter O-Ring SetAboutAboutSet of four (4) O-Rings for use with the stock air filter on the HPI Baja 5b. 2.6mm thickness, 50mm inner diameter. HPI part # 15415.