The number of step wheels depends on the design and size of the escalator. There is usually a pair of step wheels on each step, one at the front of the step and the other at the back. They cooperate with the escalator's track system to ensure the stability and smoothness of the steps during movement.1. Does the product or packaging support customization?Support product or packaging OEM.2. What advantages do you have in your peers?We have cooperated with OTIS, Thyssen, Schindler, Mitsubishi, Hitachi, Toshiba, Step, Monarch and other international famous brands all the year round. It can meet customers "one-stop, diversified" procurement needs.3. What is the product warranty period? How to carry out after-sales service of the product?All our products are guaranteed for one year; we have an after-sales technical team of more than ten people, serving you 24 hours a day.4. What payment methods are available?T/T, VISA, Mastercard, e-checking, L/C, paypal.5. Which countries and regions are the products mainly exported to?Our products are mainly exported to the Russian-speaking market.