roller blades(sin city skates,in line skate) 1)high quality 2)good service 3)reasonable price 4)long life roller blades(sin city skates,in line skate)Sizes: 31-34, 35-38, 39-42 Wheel: high rebound PU casting Bearing: Abec-5 or Abec-7 Chassis: alum Colors: black/red, blue/white and pink Adjustable system: back adjustable roller blades