10mm. According to the brief introduction of inquiry 263 road roller, it is known that the butter nozzle on Xugong 263 road roller is 10 mm, and Xugong 263 road roller adopts Xugong DVE technology, which greatly improves the handling comfort, and adopts SC8D electronically controlled high-pressure * * rail diesel engine to realize the best oil consumption working area, and the comprehensive oil consumption is reduced by 10%. The low-speed diesel engine reduces the noise emission, enhances the sealing performance of the whole machine, and reduces the noise of the whole machine by 2 decibels; Optimize the matching of transmission system, realize the best compaction speed, improve the working efficiency by 8%, and the whole machine has fast braking response and high safety and reliability.