Specifications: Material: brass, rubber Color: golden Size: top diameter: 0.59" bottom diameter: 0.39" Weight: 119g/4.19oz Package Include: 4pcs car R410a adapter kit Features: -Knurled Design: The knurled nut design enhances friction during operation, improving ease of use. -Durable: Crafted from premium brass, this product boasts high hardness and resistance to deformation, ensuring long-lasting performance and consistent reliability.