Aeromotive' line of custom fittings, hose-ends and adapters are a step above the norm, offering uncompromised fuel flow and positive sealing. Constructed of the finest aluminum and stainless steel materials, each component is CNC machined for fitment and flow, and then coated for corrosion protection. Hook-up with Aeromotive for maximum fuel system performance. All Aeromotive fittings and adapters are fully compatible with gasoline and alcohol based fuels. PartNumber : aer15623 Description : Nitrile O-Ring; Pack of 10 Title : O-Ring, Fuel Resistant Nitrile, Size -10 AN (Pak of 10) 1755 : No 3755 : Round O Ring Maximum Inside Diameter : 5/8 O Ring Minimum Inside Diameter : 5/8 Carrying Case Included : No O Ring Rim Shape : Round California Proposition 65 : WARNING: This product can expose you to chemicals including chromium, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov. Fabrication::Fittings