1. The threads fit smoothly and tightly, allowing for fast oil flow, and the oil brake responds sensitively with stable performance 2. Made of aluminum alloy, CNC machining, anodized, it is sturdy and durable 3. Suitable for oil pipe outer diameters of 5mm, inner diameters of 2.0mm/2.1mm/2.3mm 4. Installation is very simple 5. Materials: aluminum alloy + silicone
