Description: Material: Jammer door stopper is made of aluminum alloy material, which is strong and wear resistant, ensuring long term performance and reliability, and can firmly support the doorEasy to install: Portable door stopper has high reliability and performance, simple and convenient installation and removal, saving time and effort, and avoiding damage to doors and floorsQuality: Portable door security device, professional manufacturing, is a portable, high strength door security device that prevents unnecessary entryDesign: The door security device has a simple design, is beautiful and practical, lightweight, easy to carry and store, suitable for living alone, traveling or staying in a hotel on a business trip, etc., providing you with the necessary protectionWide Application: A powerful gate stopper is suitable for door gaps between 0.8 cm-5 cm/0.31 inch-1.97 inch, and the height can be adjusted. It is suitable for most doors that open inwards. Not suitable for glass doors, doors without door gaps, doors with uneven bottoms, etc. (Please confirm whether your door matches this product) Specification: Material: Aluminum Alloy Size Chart: 9.4 cmx12 cm/3.70 inchx4.72 inch Package Includes: 1x Portable Door Stopper (with Storage Bag) Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.