Slimline aluminium door signs. Our most popular material, 0.5mm rigid aluminium with a durable printed surface. Available in brushed silver and rose gold. Perfect for interior use in offices, reception areas and surgeries. Easy to Fit. Self-adhesive tape is supplied with all Slimline Aluminium signs. Apply to any clean, dry and flat surface in seconds. Stock or Custom. Choose from our range of stock designs or choose your own text with our custom options.