COUPLING (pipe connector) is a device used to connect two sections of pipes, commonly found in ventilation, heating, air conditioning and other systems. Based on the pictures and table information you provided, the following is a product introduction of this pipe connector:
Product Features:
1. Material:
Usually made of plastic (such as PVC) or metal, with good corrosion resistance and wear resistance.
2. Design:
Compact design, easy to install and disassemble.
Open at both ends, convenient for connecting pipes of different diameters.
3. Size:
A variety of sizes are available to meet the connection needs of pipes of different diameters.
According to the table you provided, there are three models: C-WP75, C-WP100 and C-WP130, and the length (L), width (W) and height (H) of each model are as follows:
C-WP75: length 62mm, width 82mm, height 70mm.
C-WP100: length 65mm, width 110mm, height 70mm.
C-WP130: length 80mm, width 140mm, height 98mm.

4. Application:
Used to connect straight or flexible ducts, especially where the direction of the duct needs to be changed or quick disassembly and maintenance is required.
Applicable to ventilation systems, heating systems, air conditioning systems, etc.
5. Installation:
Easy to install, usually connecting the duct by insertion or snap-on.
It may be necessary to use sealant or sealing gasket to ensure the tightness of the connection and prevent air leakage.
6. Maintenance:
Regularly check the sealing and structural integrity of the connector to ensure the reliability and safety of the system.
7. Product advantages:
Flexibility: Able to adapt to the connection needs of pipes of different diameters and shapes.
Durability: Made of high-quality materials, with good corrosion resistance and wear resistance.
Easy to install and maintain: Compact design, easy installation, easy maintenance and replacement.