Ignition Tune-Up Kit (For Delco Distributor) Fits John Deere Tractor Fits: John Deere: A series SN: 488000 & up, B series SN: 96000 & up, G series SN: 13000 & up, 50, 60, 70, 520, 530, 620, 630, 720, 730 Tractors Specifications Spark Plug Dimensions: 18 MM, 1/2"" Reach 7/8"" Hex Spark Plug Gap = (A thru G: 0.030"" Gap), (50 thru 730: 0.025"" Gap) Point Gap = 0.020"" Medium Hot Spark Plugs Replacement Numbers: John Deere: 386 Autolite- For DELCO distributors only Spark plug dimensions: 18 MM, 1/2"" Reach 7/8"" Hex Kit contains: Rotor, Points, Condenser, (2) Spark Plugs Will NOT fit magneto ignitions. All JJAgParts items have been hand selected by our team and are continuously monitored for Quality. Should a craftsmanship or fitment concern be identified, JJAgParts will work with you to stand behind our products. JJAgParts is an American owned and operated family business! Here at JJAgParts, we strive for customer satisfaction. If you are not satisfied with your order, please contact us so we can make it right. Note: OEM Part Numbers are for reference only and should be verified before purchase.