Comprehensive Collection: This 220-piece kit includes compression sleeve ferrules, inserts, and nuts in four versatile sizes: 1/4 inch, 3/8 inch, 5/16 inch, and 1/2 inch, making it a practical toolkit for various applications. Diverse Size Range: Includes 30 pcs of 1/4 inch compression sleeve ferrules, 30 pcs inserts, and 8 pcs nuts; 30 pcs 3/8 inch sleeve ferrules, 30 pcs inserts, and 8 pcs nuts; 20 pcs 5/16 inch sleeve ferrules, 20 pcs inserts, and 8 pcs nuts; 15 pcs 1/2 inch sleeve ferrules, 15 pcs inserts, and 6 pcs nuts. Premium Brass Material: Made from high-quality brass, these fittings offer lead-free performance, corrosion resistance, good ductility at high temperatures, and low magnetic permeability, suitable for various demanding environments. User-Friendly Design: Designed for easy installation without soldering, flaring, or deburring. The standard compression fitting design works with copper, brass, aluminum, and plastic tubing. Versatile Applications: Suitable for use in systems carrying air, water, fuel, oil, and inert gases. Prevents plastic tubing from collapsing when tightened and provides a secure, leak-resistant connection without requiring a flaring tool. Color: Gold Material: Brass Package Contents: 30 pcs nuts (1/4 inch, 3/8 inch, 5/16 inch – 8 pcs each; 1/2 inch – 6 pcs) 95 pcs compression sleeves (1/4 inch – 30 pcs; 3/8 inch – 30 pcs; 5/16 inch – 20 pcs; 1/2 inch – 15 pcs) 95 pcs inserts (1/4 inch – 30 pcs; 3/8 inch – 30 pcs; 5/16 inch – 20 pcs; 1/2 inch – 15 pcs) The package includes only the items listed above; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.