The tonnage is different and the height is different. PK10000, 5-ton knuckle arm crane, long arm length 16.3 meters, working radius 10.1 meters, PK12000, 6.3-ton knuckle arm crane, long arm length 16.5 meters, working radius 10.1 meters, PK15500, 8-ton knuckle arm crane, long arm length 18.4 meters meters, operating radius 10.1 meters, PK23500, 10-ton knuckle arm crane, long arm length 18.5 meters, operating radius 10.1 meters, PK32080, 12-ton knuckle arm crane, long arm length 21 meters, operating radius 10.1 meters, PK36080, 14-ton folding arm crane Boom crane, long arm length 21 meters, working radius 11.9 meters, PK42502, 16-ton knuckle jib crane, long arm length 21.2 meters, working radius 12 meters. Sany Palfinger crane is a crane jointly produced by World Crane Company of Italy Palfinger and Chinese company Sany Heavy Industry. The crane uses a double pump, which can perform two actions at the same time, making the work more efficient. The extended arm is longer and has a higher lifting height than similar domestic cranes. The boom adopts an octagonal boom, which is made of selected materials and is stronger. The boom will not break or deform.