Three-position Adjustment Valve: The nozzle/collector/hood has a adjustable valve with three modes: closed/half-open/fully open, you can adjust the air flow using it and prevents smoke backflow Welding fume extraction hose: Made from plastic materials, it withstands temperatures from -40°C to 100°C, is abrasion-resistant, high-strength, and maintains flexibility without shifting Stainless Steel Cover with Detachable Nozzle: Features a waterproof and rust-proof design for long-term use, including a handle and flexible adjustment capabilities 360° adjustable articulated arm and hose: Flexible hose bends to fit any space, with a jointed arm that stays in position without extra support,for tight workstations or mobile tasks Wide Range of Industrial Applications: Suitable for welding fume extraction, engraving, industrial dust collection, machine cooling, workshop vacuuming, and laboratory ventilation