DescriptionHigh quality stainless steel, high hardness, good sealing. Surface oxidation treatment, not easy to rust. Durable, sturdy, give you long terms use. Thread clear do manual work is delicate, sealing good long service life. Compatible with most product. Easy push to connect.Features- Color: Blue. - Material: Stainless steel. - Size: 12.5 x 5.5 x 2cm/ 4.92 x 2.17 x 0.79 inch. - Solid Construction: All things included in the kit are made of solid stainless steel for corrosion resistance and longer using life. - Quick Connect: 2 couplers are designed for easy-to-operate push type since they are usually used with air compressors. - The quick connect system needs just a simple PUSH to connect couplers with plugs. PULL sleeve back to remove. - Professional Design: The design of knurled sleeve gives a better grip when connecting and disconnecting these fittings. - Sleeve guard helps reduce the risk of accidental disconnects and protects the coupler sleeve.