4 Pack, Welding Helmet Lens Kit, Clear Protective Replacement Lens Fits K2799-1, K2933-1 & K2934-1 Welding Helmets, Durable Polycarbonate Plastic Lens Is Shatter Resistant & Protects The Glass Filter Lens From Weld Spatter, Clear Cover Plates Should Be Replaced On A Regular Basis Before Vision Becomes Impaired, Kit Includes 2 Large & 2 Small Lenses.