SLOT drain, wall stainlessVodalands slot drain (BASE 100P) has a 4 internal channel width (6 external) that narrows into a 5 8 width slot opening, and a length of 3. 28ft (1 meter). Customers can choose between a 1% pre slope and a non sloped system. The pre slope systems come in multi channel bundles up to your required length (maximum 13 meter lengths). The non slope systems are sold per unit, but can be connected together to create a system with whichever length you