The Roxtec Knock-out Sleeve (KOS) is a BIM object and Revit family designed to simplify the installation of cable and pipe transits in concrete structures. It acts as a temporary placeholder that ensures precise positioning of future penetrations and makes it easy to install Roxtec sealing systems at a later stage. Key features: BIM object optimized for Revit workflows in building and infrastructure projects; round sleeve for casting into concrete walls, floors, and foundations; reduces the need for core drilling and saves time during construction; compatible with Roxtec sealing modules for flexible cable and pipe configurations; available in multiple sizes to fit different openings; watertight and gastight when used with Roxtec seals; durable and easy to remove for final installation. The Roxtec Knock-out Sleeve KOS helps architects, engineers, and contractors design and prepare accurate cable and pipe penetrations directly in BIM models.