Introducing our factory-made Sight Glass for Copeland 4,6D 4,6R series compressors! Designed to enhance compressor performance and reliability, this high-quality sight glass allows for easy monitoring of refrigerant levels. Crafted with precision, it ensures optimal system functioning and prevents potential issues. Featuring durable construction, this sight glass is built to last, with a clear design providing clear visibility. Trust our factory-produced sight glass to enhance your Copeland compressor's efficiency, enabling seamless operation and peace of mind.