QA1's AF Aluminum Series rod ends are female Endura rod ends that are designed specifically for performance applications where weight is a concern. With a Nylon/PTFE injection molded race, these rod ends are completely self-sealing and self-lubricating, keeping dirt and debris out. Over 10% lighter than traditional three-piece aluminum rod ends, the AF Series rod ends are the most wear-resistant aluminum design available. Ball 52100 Bearing Steel. Heat Treated. Hard Chrome Plated. Precision Ground. Race Nylon/PTFE. Self-Lubricating. Self-Sealing. Body Aircraft Aluminum. Color Anodized Red as Standard. Exclusive Features Metal to Metal Support for Heavy Shock Loads. Increased Cross-Sectional Thickness for Greater Tensile Strength.