Zf 64 Tube For Roller Shutter Winding Axle. Length: Tube: 3.5 m. Material: Sendzimir Galvanised Steel 20 Microns Double Sided, 275 g Zinc Per M². Feature: Weight/ml = 1.1kg For Ep. 0.6 Moment of inertia: 6.33 Cm4 Center Reservation For Type 50 Engine. Galvanized steel provides maximum protection against corrosion (no change after 96 hours uninterrupted in the fog). Excellent flexural resistance to support very large roller shutter aprons. Attention: You must choose Express shipping for this item (required). Also, this product is sold only in 3.5 m size, for sale by the meter you need to call our customer service.