Reliable four stroke engine delivers low emission and noise. Durable Plastic oil tank offers longer life and rust-free. Laminated wood and steel shoe absorbs and withstand vibration shock. Protective top frame cover eliminates possible damage to the engine. Innovative engine side cover protects and guards recoil starter from particles. Convenient rollers for easy loading. Perfectly balanced while delivering ideal compaction with controlled jumping motions. Without affecting the impact force. German manufactured polyurethane ribbed bellow for long life.