Easy to install, fits both 65mm & 80mm downpipes. Instructions included. When full, overflow diverts back to downpipe. All fittings in photo supplied including 1 hedgehog gutter filter and two concrete blocks to raise. All you need is a small amount of garden hose to join, and a hacksaw to cut downpipe. Now fitted with a brass tap. Barrel only is 900mm high x 700mm wide