Drossbach Ducting is a spiral wound former made of high-quality galvanised steel, making it exceptionally strong and durable for casting into concrete. It can be easily tied into position adjacent to reinforcing steel and is perfect for use in precast connections, service penetrations, formers for starter bars, and post-tensioning ducts. Powerpac Drossbach is available in sizes ranging from 40mm to 130mm, and is manufactured in-house by our team to ensure competitive pricing without sacrificing quality or speed of delivery to your site.