Features: Enhances your 3D printing experience with PTFE Bowden Tube Connectors, for durability and high performances. from plastic, these 4mm pneumatic fittings feature a secure locking mechanism to ensures a tight connection for your 3D printers filament guide systems. for both hobbyists and professional users, these connectors offer compatibility with wide of 3D printers and accessories. Whether you're upgrading your home workshop or optimizing a commercial 3D printing, these Bowden tube connectors provide the reliability you need for consistent printing result. With blend convenience, our connectors for anyone to achieve precise and smooth 3D printing projects. Specifications: Materials: Plastic Size:5x5x2cm Color: Blue, Orange(optional) Package Includes: 4Pair PTFE Tube Connectors note: Please allow 0-1cm error due to manual measurement. make sure not mind before bid. Due to the differenceS between different monitors, the picture may not reflect the actual of the item. Thank you!