Welcome to Aluminium Windows Cape Town We have aluminium retractable security gates at steel prices as well different range at burglar bars. So give us a call and you will be pleasantly surprised. The Alu-Trellis security gate is manufactured from a high strength structural grade Aluminium alloy designed to offer a corrosion resistant product at market beating prices. The gate is powder coated in the popular range of Architectural Industry powders designed to match existing window and door installations. The light all Aluminium design offers a very smooth sliding action making everyday use easy and effortless with Aluminium Windows Cape Town.