You are bidding on a set of 2, machined of solid billet aluminum and brass, petcocks just as pictured. One is reserve and one is main. They come with standard screw in filters as pictured. These are machined perfectly and will replace 1/4-19 BSP British standard pipe or If your bung hole is 1/2" ID then these will work on your British gas tank. Fits direct to Triumph, Norton, and most BSA tanks, for 3/8" use with adapter in our ebay store. These are in perfect condition, never installed. The body measures 1 1/4" tall and 15/16" thick square. On off dial is 1/4" turn, these are crafted in the USA. Check out our ebay store for more parts and accessories. Contact us with any questions 661-252-1174 Enjoy!