Trend AQ109/B/500 Aqua 109 & P11 style brown 500M Aqua 109 stripWeather strip is fitted into the window frame aperture using four cut lng.s. It is important to create tight butt or notched joints to ensure high levels of window performance. Joints can be enhanced by the application of a small amount of silicone mastic. When fitted, it is necessary to notch the seal end.Groove size required 2.8mm wide x 6mm deep.Performance BS 12365-12003 Classification W35560Specification-Colour=Brownlng.=500m (2 x 250m)Seal size excl barb=11mmx6.8mm