High Quality Materials: The Material Is Abs Plastic, Anti-Rust, Anti-Corrosion And Durable. Easy to Use: No Handle Design, Press to Open. This Shock Absorber Is A Simple And Efficient Way to Open And Close Your Door with Heilwiyout Pulling It. No Noise: It Is A Special Device with Heilwiy A Wear-Resistant Rubber Seal That Allows The Door to Be Closed Tightly And Noiselessly. Unique And Intimate Design: The Head Is Adjusted to Fit In The Event Error. The Adjustment Range Is from 1Mm to 2Mm. Adjustable Design: Adjustable Length, Intimate Design, to Meet Your Different Needs. There Is An Adjustment Position At The Bottom, So Make Sure The Length Is Required Before Use And Adjust The Rebound Length 20 Or 40Mm If Necessary. Just Turn The Adjustment Slot Left Or Right to Adjust The Groove, As Shown In Figure 5.