... Resin Demarcation Line optional 3.CE & ISO9001:2008 Aluminium Alloy Escalator StepI. Specifications Intro:1. Step Width (mm ... Steps materials 1.Steps materials divide Stainless steel & Aluminium alloy (both with Yellow Resin Demarcation Line optional )a). ... clean and maintenance, weight more than aluminumb).Aluminium alloy Step: Surface bright, Light weight, High strength, Corrosion resistance, Easy ...