The Polylok 300mm round drainage box is the most versatile box on the market today. When installing on-site, you can choose what height you want your pipe connection to be at by using the most suitable cutter guides on the sides. It also comes complete with the only seal on the market of distribution boxes that accepts 2″, 3″, 4″ (110mm), and pipe – 4 x seals shipped with every box!. It is also supplied with stabilizing feet to anchor the box and a tough 300mm flat cover which can be locked in place with 4 screws. This distribution/drainage box can easily take 300mm (12″) risers if you need even more height.