• Easy to use
• Highly durable
• 4" inch, 4RV-UAM, Universal Male Adapter
• Designed for type B gas vent
• Allows Metalbestos B-vent connectors to be used in conjunction with other brands of existing vent
• Used to adapt to Metalbestos pipe toward termination
• Features a snap together, non-positional lock system, die-formed ends and eliminates the need for all cutting, fitting and special engineering