Cascade Cast Iron Style 115mm x 4m Plastic Deepstyle Guttering - Black Available in up to 4m lengths, the guttering must slope gently downwards at least 12mm every 3m towards the running outlet in order to provide effective drainage. It should be fixed at 1m intervals with a gutter support bracket. Combining period Cast Iron detailing and styling, deepstyle is a higher capacity semi elliptical rainwater system, providing greater drainage efficiency on larger roof areas. Features Authentic detailing and finish on downpipe, guttering, hoppers and fittings. Fully compatible with the Cast Iron Style Soil System. Incorporates 68mm Round Downpipe. Choice of Ogee, Bath, Gothic and motiffed hopper designs. Available in six colour options: Classic Black, Oxford Blue, Olive Green, Graphite Grey, Sandstone, Porcelain White.