PC4-M6: Industrial standard, high pressure resistance, suitable for DIY, 3D printing and other scenarios. Suitable for 3D printers/small air circuits, compatible with most printers. Thread: Metric thread (Metric) M6x1.0 Universal connector, universal connector, suitable for 6mm outer diameter air pipe. Compatible air pipe size: suitable for 4-6mm air pipe (such as 4mm PU pipe). Sealing method: Metric thread, usually with O-ring or cone seal. Pressure level: Common pressure less than equal 1MPa (universal). This accessory is only used in the 3D printing industry, and no technical support is provided for other industries. 3D printing uses hard tubes to pass directly through, while other industries use hoses, sleeves, etc. Notes:Threads are not universal: PC4-01 (G1/8 inch) and PC4-M6 (M6) are not directly interchangeable and require an adapter. Note:The PTFE tube shown in the picture is not included in the package. Color:As Shown Material:Brass + Plastic Package Contents: 4 * PC4-M6 Pneumatic connector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.