Bong Zumo 4.2mm Orange LogoWith its extreme size the 'Zumo 4. 2 Orange' does great credit to its name. The height of 50cm combined with a diameter of 65mm equals an air volume of over one litre clearly a pipe for the sporty smoker! A large stand of about 15cm diameter makes sure the massive pipe has a secure footing. This bong consists of a cylinder, a down tube and a separate lift off bowl. All Roor glass bongs come complete with a Roor glass gauze.