There are numerous educational kits, science kits, chemistry kits, kids science kits and many more laboratory glassware and plastic ware products available at http://www.acumenlabware.com/ various educational models such as petrol and diesel engine two stroke models or diesel engine four stroke models can be had from acumen labware at the following link provided:
two stroke:
http://www.acumenlabware.com/heat/diesel-engine-two-stroke.html
four stroke
http://www.acumenlabware.com/heat/diesel-engine-four-stroke.html
