This Castel filter dryer shell is perfect for those looking for a high-quality solution to their liquid and suction line needs. Designed for use with filters, this reversible/bi-flow filter dryer is compatible with a variety of brands and models. The blue color adds a pop of interest to any HVAC or refrigeration system, while the 1-1/8 inch connection size ensures a secure and reliable fit. Made for use in both residential and industrial settings, this filter dryer shell is a must-have accessory for anyone looking to maintain the efficiency of their HVAC or refrigeration system. With its durable construction and reliable design, this Castel filter dryer shell is sure to provide years of worry-free use.