ROBUST AND machined via a fully automated precision CNC (computer numerical control) machine tool to ensure product quality stability and durability. With machining surface finish Fully automated precision CNC, the product has a perfect smooth surface that reflects light very evenly, so the appearance of the product is very aesthetic Premium quality product. Won't rust, stays stainless forever - a durable quality product that can last a lifetime! Adjustable height: min. height: 75mm, Max. height: 110 mm Each door stopper comes with an extra/spare rubber tip! Instructions: Use a flat blade screwdriver to secure the brass bolt firmly after adjusting the height of the door stopper. Delivered quantity: 1 piece Note: The data are all manual measurements, please allow 1-3cm error; due to the difference in light and display, there would be some color difference, please refer to the actual item received.