There is a choice of 5 different roller/rotor. The roller is chosen according to the size of the seed to sow.

• White roller: Very small seeds (Very small seed flow, carrot type)
  
  
• Green roller: Small Seeds (Clover, Rapeseed, Mustard, Alfalfa – Powder/Micro Granules)
  
  
• Yellow roller: Medium Seeds (Radish, Seed Mix – Starter Fertilizer)
  
  
• Red roller: Large seeds (Raygrass, oats, barley, wheat, vetch, faba)
  
  
• Black roller: Very large seeds (Faba bean, peas, vetch)

White and black splines are only used in special cases.