Who is midland plastics? Founded in 1945 as a distributor of stock plastic shapes, Midland Plastics, Inc., headquartered in New Berlin, Wisconsin, is one of the oldest and largest plastics suppliers in the Midwest.Why choose midland plastics plumbing stoke ltd? Choose Midland Plastics & Plumbing Stoke Ltd. At Midland Plastics & Plumbing Stoke Ltd, we offer a wide range of products to fulfil your bathroom fitting and roofing needs. Whether you need uPVC cladding, underground drainage products, plumbing supplies, or kitchen and bathroom panels, get in touch with us.Whats new at midland? Throughout our rich, 75 plus year history, Midland has stayed at the forefront of technological development and been able to continue expanding our offerings and locations: 2020 - Added 2 new CNC vertical milling centers with 5-axis capabilities; 1 each in New Berlin and De Pere, WI.