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Metal Crown Sleeve 315 mm is a metal accessory designed to connect ventilation pipes to extraction boxes or air outlets in walls within Indoor cultivation systems.
Its strength guarantees a secure and efficient coupling.

The Metal Crown Sleeve 315 mm is an essential piece among cannabis cultivation accessories, as it facilitates the installation of ventilation systems in cheap indoor grow tents and larger grow rooms.
Made of durable metal, it offers superior durability compared to plastic models, allowing air ducts to be firmly secured and preventing losses in airflow. Installation is simple: just screw it to the surface (wall or extraction box) and attach the ventilation duct using metal clamps or duct tape, achieving a secure, leak-free seal.
Its measurements are designed to fit standard systems, with an inner diameter of 315 mm, a height of 62 mm, and an outer diameter of 351 mm, ensuring compatibility with the most commonly used equipment in the ventilation market for cultivation.
Thanks to these features, it becomes an indispensable accessory for any Grow Shop in Spain and for growers seeking efficiency in air renewal.
The Metal Crown Sleeve 315 mm plays a fundamental role in Indoor cultivation, where ventilation is key to maintaining optimal temperature and humidity conditions.
Its main function is to ensure the correct connection between ventilation ducts and extraction boxes, allowing air to circulate without losses or leaks that could affect the grow environment.
The Metal Crown Sleeve 315 mm is used to connect large diameter ventilation ducts to extraction systems.
It offers a robust and practical solution for securing ducts to equipment or the wall, ensuring that the installation maintains a constant and efficient airflow at all times.
Among cannabis cultivation accessories, the Metal Crown Sleeve 315 mm stands out for its usefulness and resistance. It is especially designed for larger ventilation projects, such as large cheap indoor grow tents or complete rooms. Its metal construction ensures that the accessory can withstand air pressure without deforming or giving way over time.
It is used to secure ventilation ducts to extraction boxes or air outlets in walls, especially in large diameter installations. Thanks to the Metal Crown Sleeve 315 mm, an effective seal is achieved that prevents air leaks and keeps the ventilation system stable, which is vital for maintaining an optimal environment in indoor crops.
The way to use the Metal Crown Sleeve 315 mm is simple and practical. First, drill the mounting surface, secure the accessory with screws, and then insert the ventilation duct into the metal crown. To secure the assembly, it is recommended to use metal clamps or duct tape, ensuring a firm and secure seal that keeps the airflow constant.
The main advantages of this accessory are:
The Metal Crown Sleeve 315 mm is available at Hydroponics Blanes, a trusted Grow Shop specialized in Indoor cultivation. In this online store you can find all kinds of cannabis cultivation accessories, from ventilation ducts to extractors and cheap indoor grow tents.
In addition, they offer discreet shipping and 24/48 hour delivery throughout Spain and shipping to Portugal, France, Germany, and Italy, making Hydroponics Blanes the best option for purchasing this type of product.
The Metal Crown Sleeve 315 mm is an indispensable accessory for maintaining efficient ventilation systems in indoor crops. Its metal design, resistance, and ease of installation make it a practical and durable solution.
Available at Hydroponics Blanes with discreet shipping, it is the most recommended option to improve any Indoor cultivation project in Spain and Europe.