Comprehensive Collection: This 220-piece kit includes compression sleeve ferrules, inserts, and nuts in four versatile sizes: 1/4inch, 3/8inch, 5/16inch, and 1/2inch, making it an essential toolkit for handling applications effortlessly. Diverse Size Range: Equipped for diverse needs: 30pcs of 1/4inch compression sleeve ferrules, 30pcs inserts, and 8pcs nuts, 30pcs 3/8inch sleeve ferrules, 30pcs inserts, and 8pcs nuts, 20pcs 5/16inch sleeve ferrules, 20pcs inserts, 8pcs nuts, and 15pcs 1/2inch sleeve ferrules, 15pcs inserts, and 6pcs nuts. Premium Brass Material: Made from high-quality, brass, these fittings lead-free usage, resistance, impressive ductility at high temperatures, and minimal magnetic permeability, making them ideal for a variety of harsh environmental conditions. User-Friendly Design: Our fittings are designed for easy use, requiring no soldering, flaring, or deburring during assembly. This ease of use combined with the standard compression fitting design allows for broad application across tubing including copper, brass, aluminum, or plastic. Versatile Applications: Perfectly suited for connecting lines in systems transporting air, water, fuel, oil, and inert gases. The design prevents plastic tubing from collapsing when tightened and ensures a leak-free secure connection without needing a flaring tool. Colour:gold Material:brass Package Contents: 30*nuts (1/4 inch, 3/8inch, 5/16 inch each; 1/2inch 6) 95*compressed sleeve sleeve (1/4 inch, 3/8inch each 30;, 5/16 inch 20;1/2inch 15) 95*inserting parts (1/4 inch, 3/8inch 30 5/16 inch each; 1/2inch 15) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.