For converting standard versions with a short housing into a version with a long housing. Conversion possible directly on site. Protects motor and impeller. Protected against the weather by sheet steel with epoxy coating. Special design: Casing extensions for sizes 140 and 160 are available on request: GVI 90, material: sheet steel, epoxy-coated, colour: grey, weight: 30 kg, weight with packaging: 30 kg, width: 1030 mm, height: 1030 mm, depth: 340 mm, width with packaging: 1030 mm, height with packaging: 1030 mm, depth with packaging: 340 mm.