DescriptionHigh quality aluminum, 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 a good long service life. Compatible with most products. Easy push to connect.Features- Color: Blue. - Material: Aluminum. - Size: 3.50 x 3.50 x 3.00cm/ 1.38 x 1.38 x 1.18 inch. - The design of anti slips sleeve gives a better grip when connecting and disconnecting these fittings. - Quick connect, coupler is designed for easy-to-operate push type since they are usually used with air compressors. - Wide application, this kit can be widely used on different air tools such as air compressors, air blow tools, air nailers etc. - Adopted from material, it is durable and long lasting use. - It is manufactured with professional technology to ensure the of the product and can work for a long time.