Roller diameter: 1 ¾" Height: 12" Uses tall C bracket for mounting Heavy duty weld bolt on or on bracket Easy installation! Never needs greasing or maintenance PACKAGE INCLUDES: 1 (ONE) ALEKO Side Roller for Sliding Rolling Gate Guide Roller Black Guide with Bracket, 12-inch For better stabilization and performance high quality ALEKO rollers are available to be mounted vertically along both sides of a gate and help prevent them from tipping over. These are made of UV protected hard plastic and are available and sold individually but for true stabilization a pair would be required. These are designed to withstand adverse climatic conditions and can be affixed to the posts next to your gate via welding or bolting. These rollers have excellent lasting and are maintenance free. NOTE: 2 (TWO) ROLLERS ARE REQUIRED FOR EACH GATE.