We buy used pin lock soda kegs, which we clean using a commercial keg cleaner. We then replace the gaskets and run the kegs through a rigorous sanitation process using Star San. The outside of the keg may still be dirty, have old stickers on the outside, as well as scratches and dings, but still work fine for your draft purposes. The rubber top and bottom may be black, green, blue or red.
These reconditioned, stainless steel pin lock kegs hold 5 gallons. The hatch is big enough for easy cleaning and filling. Kegs measure approximately 26″ tall, 9 inches in diameter, with some slight variation between producers.