Harcon RP10K Slate Roofline Extractor Vent - 600mm x 300mm - 10,000mm2 RP10K pipe terminal that can provide a 110mm connections Please note due to production times any orders over 4 vent tiles will be on an estimated lead time of 7 to 10 working days. PLEASE ADVISE ON COLOUR & FINISH: Anthracite or Blue/Black and Square Edge or Riven Edge Ventilation area: 10,000mm2. Airflow resistance: 19.5 pascals @ 30ltr/sec. Roof pitch: 20 degree pitch. Water resistance: exceeds all relevant parts DoE partners in technology programme. Description An exceptionally discreet vent designed for use in slate roofs. The RV10K and RP10K Roofline Slate vent are available in two sizes: 600 x 300mm and 500 x 500mm. The 500 x 500mm unit positions the vent in the centre with a simulated joint line, so it blends into a roof of 500 x 250mm slates. Both RP10K and RP20K are available in either a riven finish to match natural slate or a plain finish to match man made tiles. Features Careful design ensures the slate roofline vent is virtually invisible from the ground. A box below the vent collects any water that enters it and ducts it back onto the roof.