Features: 1/4 female thread or 1/2 male thread, 2-way or 3-way quick coupler for option. Made of high quality carbon steel, with high strength and great durability. Anti-explosion design, durable and safe to use. Self-locking C-type air coupler. Heavy duty quick connector, thickened design. Perfect fit. no leakage. Widely used in air hose, air compressor, air pump, pneumatic wrench, automotive tools, etc. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.