Features: Crafted from PP plastic, this pneumatic connector tube plugs ensures superior corrosions resistance and airtights sealing to prevent gas leaks in pneumatic systems. Available in multiple size (PP4-PP16), the plugs features a push fit design for quick installation and secure blockage of air/gas flows in industrial tubing. Essential for maintenance engineers and pneumatic systems technicians requiring reliabled tube sealing solution for machinery and equipment. Perfect for workshop applications, effectively isolating pneumatic lines during systems repairs, pressure testing, or component replacements. Designing with precise molded thread and ergonomic ridges for slip resistant handling in high pressure pneumatic tool environment. Specifications: Component: Plastic Size: 28x4mm/31x6mm/35x8mm/40x10mm/41x12mm/45x14mm/46x16mm Color: Black Package Includes: 20pcs Air Tube Plugs Connector note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.