Sole distributor for Martek Products in the UK and Ireland: PRODUCTS / LANE MARKERS: M03515 Lane Marker: Swimming and water sports activations help to be marking dangerous zone. Colour: White, red Raw material:Polyethylene Diameter: 15cm, Length: 60 cm, Weight: 1 kg Click to see the applications. M03520 Lane Marker: Swimming and water sports activations help to be marking dangerous zone. Colour: White, red Raw material:Polyethylene Diameter: 20cm, Length: 80 cm, Weight: 2 kg