Mountain bikers and bike mechanics, listen up! This set of copper hose adapter fittings is exactly what you need for maintaining your hydraulic disc brake systems. Specifically designed to fit BH90 bicycle tubing and compatible with Shimano SLX, XT, and XTR brake systems, these fittings are made from high-quality copper that's rust-resistant and super durable. The copper material has excellent toughness and hardness, meaning these fittings can handle the high and low temperature extremes that come with intense riding conditions. Installation is straightforward - these small but crucial accessories make brake line work much easier, whether you're building up a new bike or doing maintenance on your current setup. The high blasting coefficient ensures they're safe to use under pressure, giving you peace of mind on those steep descents. Each fitting weighs about 13 grams, so they're lightweight additions to your bike. The package includes a complete set of everything you need for your brake line assembly or repair work. These are 100% brand new OEM-quality replacements that perform just as well as the original parts. If you're working on your bike's hydraulic brakes, having these on hand can save you from downtime when you need to replace or repair your brake lines. They're that essential bit of kit that every serious cyclist or bike mechanic should have in their toolbox for reliable brake performance ride after ride.