Neovivid Walking Cane Stick with Working Steam Engine Model, Steampunk Walking Cane Stick Working Steam Engine makes it a Unique Steampunk Accessory Material : Brass, Wood, Finish : Antiquated Brass Overall Length : 40" appox. Weight : 1.8 lbs approx. A free brass keyring is sent along as a gift. Pressure Range of compressed air/steam : 12 -25 PSI Engine is single cylinder oscillating type with 10 mm bore x 10 mm stroke.