Ultra-compact. Enhanced operator protection. The efficient and easy-to-use Kubota U10-3 with zero tail swing is the mini-excavator you can count on to get the job done. As an alternative at extra cost this Mini Digger has a Diesel Oxidation Catalyst (DOC) which is a catalytic converter. This will very effectively remove the majority of the toxic components from the exhaust fumes (Carbon Monoxide and Hydrocarbons) and allow the machine to be used in doors. It is tried and tested technology, maintenance free and reliable.