1. The function of the tube is to reduce resistance and guide consumables. 2. The inner diameter of the tube is 2.5 mm and the outer diameter is 4 mm. 3. High tensile strength: It can withstand a certain external tensile force without breaking easily. 4. Good flexibility: It is easy to bend and install, and can adapt to complex pipeline layouts. 5. Please note that the tube is a consumable and has the risk of wear. It is recommended to check the tube regularly for wear and replace it if necessary. Specifications: Due to different batches, there may be differences in product appearance and printed text, which not affect use Colour: Transparent gray Material: PTFE Package Contents: 1 roll * 4 x 2.5mm feeding tube 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.