These M20 cable gland caps are such simple but essential little components for anyone working with electrical installations! Made from durable nylon with rubber components, they provide serious protection against water, dust, salt, acid, oil, and common solvents. The M20 thread size (that's 0.8 inches in diameter) fits standard glands perfectly, and the overall dimensions are 26.5x12.5mm - compact but substantial. The special clamping die and rubber part design provides strong stretching resistance without damaging your cables or equipment. They're perfect for use in mechanical control boxes, distribution boxes, machinery, electrical appliances, and pretty much any application where you need to protect threaded connections from environmental factors. Installation is straightforward - just screw them onto your existing gland threads. The gray color is neutral and professional-looking for industrial settings. You get 10 pieces in the pack, which is perfect for having spares on hand for multiple projects or replacements. The quality is solid - these aren't flimsy caps that will crack or break easily. Whether you're an electrician, maintenance technician, or DIY enthusiast working on electrical projects, having these caps available ensures your connections stay protected and clean. They're one of those small components that make a big difference in the longevity and reliability of your electrical installations. The value is excellent for how much protection they provide, and they store easily in your toolbox until you need them.