We, Royal Micro Irrigation Systems Are Authorised Dealers And Service Providers Of Garden Machinery. Professional backpack blowers from STIHL are ideal for tending large private grounds or public parks. Leaves, gras cuttings and garden debris are moved easily with the powerful air stream. Even larger items such as paper cups and cans are swept up. STIHL backpack blowers are also available with the patented 4-MIX engine. STIHL 4-MIX combines the advantages of a 2-stroke engine with those of a 4-stroke engine resulting in less emission, no need for oil services and a more pleasant noise.