One set of Heavy duty pontoon undercarriage, PU330, to Caterpillar CAT330D amphibious excavator, was delivered to the customer in United States in June of 2013. 

Its pontoon bottom has double layers of steel plates, reinforced with UWHDPE wearing plates and heavy duty track chains and cleats. Pontoons size, 11m*2.25m*1.8m, four chains per pontoon. Customer took part in the design and inspection of hte production. He ordered the central pontoons and tug boats together with the main pontoons to build his amphibious excavator fleet.