Features: Durability and Oxidation Resistancemail: Produced from excellent rustless, this product proposals better durability and oxidation resistance, suitable for strong conditions. Effective Security: Features particularly developed openings to effectively stop small animals like rodents and feathered from entering, while blocking leaves and debris to avoid clogging. Easy Installatparticlemail: Arrives with a finish set of installation addons, allowing users to easily install it lacking the need for professional tools. Ventilation Planumberebog: Ensures smooth stream while maintaining good ventilation to stop unpleasant odors. Flexible Scalsinging: Available in multiple measurements to fit different drainpipe diameters, meeting varied consumer demands. Specifications: Ventilation planumberebog: Secure smooth stream while maintaining good ventilation effect to stop odor. Multiple size selectparticlemail: Furnishes a variety of specifications to adapt to different drainpipe diameters to meet consumer demands. Security and environmental security: The materials is not deadly and innocuous, meet environmental criteria, and is more consistent utilized. Package Includes: 1 over-concern Bird Barrier note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.