Bohler Welding Air Duct for Guardian and Big Vision Helmets 87143 The Bohler Air Duct is a must-have accessory for any welder who uses a Guardian or Big Vision helmet. It provides a constant flow of fresh air to your helmet, keeping you cool and comfortable even during the longest welding sessions. The Air Duct is easy to install and use. Simply attach it to the air duct connector on your helmet and connect the other end to a compressed air source. The Air Duct is made of durable materials and is designed to withstand the rigors of everyday welding. Features Adjustable outlet for easy airflow control Durable construction for extended use Easy to install and use Compatible with Guardian and Big Vision helmets Compatibility Guardian 50M Air Guardian 50FM Air Benefits: Stay cool and comfortable while you weld Reduce fatigue and improve focus Improve welding performance Extend the life of your helmet GBP 16.99 1