The HP ProBook 430 G5 rubber feet are essential components that provide stability and protect the laptop's base from wear. Typically made from durable materials like rubber or thermoplastic elastomer (TPE), these feet are designed to prevent slipping and reduce vibration noise during use. They are usually adhesive-backed for easy installation and replacement. While specific dimensions may vary, it's advisable to consult the laptop's service manual or contact HP support for precise specifications.