The performer displays a clear acrylic cylinder with three balls inside--two yellow balls with a red ball in the middle. They can be examined. The two yellow balls are dropped into the cylinder and hidden with a silver cover. The red ball is genuinely placed in the performers pocket. With a magic pass the ball is transferred invisibly, from the pocket to the cylinder. When the silver cover is lifted off the cylinder, the red ball re-appears between the two yellow ones. Once again the crystal cylinder with the ball can be given for examination, and the silver cover and pocket shown to be empty. The apparatus we supply comprises of a clear acrylic tube approximately 5.5" high, and a little less than 2" in diameter. The silver cover is in stainless steel, and large enough to just fit over the acrylic tube. You also get all the required balls and full working instructions.