Ronfell Aviation

Airfield Lighting & Equipment | Tel: 01257 471060| Email:

Obstruction Marking Sphere

Aviation obstruction marking sphere is designed to provide daytime visual warning or nighttime visual warning if comes with reflective tape, for electricity transmission line and overhead wire for aircraft pilots, especially cross river high voltage transmission lines. The power line marker ball is made of high-grade Fiberglass Reinforced Plastics (FRP), diameter of 600mm and 800mm are available to meet different customers’ needs.

A marking sphere should be of one color such as aviation orange, white and red. Generally, the marking spheres are placed on the highest line. Where there is more than one line at the highest level, white and red, or white and orange spheres should be displayed alternately.


  • Fiberglass Reinforced Polymer durable material with better weather resistant
  • Super corrosion resistant character, stainless steel bolts and nuts
  • Aluminum alloy cable clamp guarantees good corrosion resistance
  • Various size of cable clamps are available to fit for customers’ cable conductor
  • Drain holes structure can prevent accumulated rain water inside the spheres
  • Stacking compatible design, save storage space and freight charge
  • Optional Preformed Armor Rods provide better protection against vibration and abrasion
  • Optional Reflective tape is more durable and economical solution for night visibility
  • Both sphere diameters of 600mm and 800mm are available


Visable Distance 1200 meters
Voltage Range 35KV ~ 1000KV
Conductor Diameter 6.5-55mm
Mechanical structure
Color Orange, Red, White, Orange/White, Red/White
Sphere body FRP(Fiberglass Reinforced Polyester)
Cable clamp Aluminum alloy
Bolts/nuts/washers Stainless steel 304
Diameter 600mm / 800mm
Weight 6.9KG / 9.0KG
Thickness 3mm
Drain holes Yes
Optional • Preformed Armor Rods
• Reflective Strip
Warranty 2 Years

If you require further details or would like to place an order. Please contact our sales team directly
Tel: 01257 471177
Tel: 01257 471060


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