Piston II£220.00PriceAdd to CartDescriptionThe aim is to remove four balls from the puzzle. A challenging, six-stage, sequential discovery puzzle. Difficulty: 7/10 DetailsMachined from solid brass, Piston II measures 35mm diameter, 138mm in height, and weighs 1.1kg. The brass is left unfinished, leaving it to slowly patinate and darken with use. SpoilersIf you're stuck on a puzzle, email info@felixure.com and ask for a clue.