100mm or 4 inch PU Ducting is a type of flexible ducting hose made from polyurethane (PU) material. It is commonly used for ventilation and air conditioning applications, as well as for moving air, fumes, and dust in industrial settings.

The benefits of using this size of PU ducting include:

1. High Durability: PU is a highly durable material that is resistant to abrasion, chemicals, and UV rays, making the hose suitable for use in a variety of industrial settings.

2. Flexibility: The ducting hose is highly flexible, which allows for easy installation in tight spaces and around corners.

3. Lightweight: Compared to other materials, PU is lightweight, making it easy to handle and transport.

4. High Temperature Resistance: The hose can withstand high temperatures, making it suitable for use in applications that involve hot air or gases.

5. Abrasion resistance: The PU material is known to be highly abrasive resistant which makes the hose suitable for applications that involve the movement of abrasive materials.

6. Excellent Flow rate: The 100mm or 4 inch size of the ducting hose allows for a higher flow rate of air or other materials, which can increase the efficiency of the system.

7. Easy to Clean: The hose can be easily cleaned and sterilized, making it suitable for use in cleanrooms and other sterile environments.

8. Low Friction Loss: The ducting hose has a smooth interior surface that reduces the friction loss and improves the airflow.

9. Wide Range of Applications: The hose can be used in various industries, including construction, manufacturing, agriculture, and food processing.

10. Variety of Lengths: The hose comes in different standard lengths, and can be cut to your desired length.