These brass compression ferrules are exactly what you need for various plumbing and pneumatic projects! With 100 pieces in the pack, you've got plenty for current jobs and future repairs. The 5/32-inch inner diameter works perfectly with copper, brass, aluminum, or plastic tubing of that size. The brass material is corrosion-resistant and durable, ensuring a long service life without rust issues. Each ferrule measures about 5.8mm in outer diameter and 4.5mm in height - compact but effective for creating secure, leak-proof connections. The smooth surface allows for multiple reassemblies if needed, which is great for projects where you might need to make adjustments. Installation is straightforward - no special tools required, just clean your pipe connections first, then hand-tighten or use a wrench for the final secure fit. They're perfect for air lines, fuel lines, water connections, oil systems, and inert gas applications around the house, workshop, or light industrial settings. The quality is consistent across all 100 pieces, with precise machining that ensures reliable performance. Having this assortment on hand means you're always prepared for quick repairs or new projects without running to the hardware store. Whether you're a DIY enthusiast, mechanic, or work with pneumatic systems, these compression ferrules provide that professional-grade connection solution at an affordable bulk price. Just double-check your tube diameter before ordering to ensure proper fit - but if you're working with 5/32-inch OD tubing, these are absolutely perfect!