1,Type: ZRD 2,Function: Spinning the fishing net 3,Quality: Good 4,Price: Reasonable ... Model Knot typeSingle or double knotPitch (mm)7,7.2,7,5,8,8.5,9,10,11,12.5 ... velocity (r/min)13-21Main motor power (kw)1.5,2.2,3Outline sizeLength (mm)8500,9050,8900,9200,9620,7310,7160 ...