Holulo Welding Goggle Flip Front Safety Glasses Welder Glasses For Gas Welding Lens Color: one is transparent, another is dark ink; Double lens, you can switch over when you are in welding. Elastic headband for user comfort; here are 4 breathable hole on the left, right , up and down-to protect eye from radiation of welding arc Flip-up front for convenience; No. 5 shade for safe acetylene welding; Features a compact design Rigid 50 mm dual-cup goggles; There are 4 breathable hole on the left, right , up and down-to protect eye from radiation of welding arc Apply in welding , splash proof , manual oxygen cutting,smelting, tin soldering, copper brazing, and welding sparks radiation places.