Six Collectable Vintage AC Fire Ring Spark Plugs for sale. All six boxes are for size 46 as stated on the box. The Spark plugs are different sizes, three of them are size 46S, two are size 48 and one is size 45 as labeled on the spark plugs. The 46S were clearly used at one point but the others are pretty clean. This is more of a collectors item as I cannot attest to the functionality of the plugs themselves. If you have any questions feel free to send me a message.