Safety Goggles SMT-221
the SMT-221 welding goggles safety goggles. Both models are engineered for industrial durability but serve distinct safety roles.
The technical specifications and functional applications for both the SMT-221 welding goggles. Both models are engineered for industrial durability but serve distinct safety roles.
SMT-221: Double Lens Flip-Front Goggles
The SMT-221 is a specialized protective tool designed for high-heat environments where users must frequently transition between high-intensity light and standard visibility.
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Construction & Materials: The body is crafted from high-impact plastic with a green-colored frame and a secondary black frame for the lens housing.
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Dual-Lens System: It features a unique “double” lens design:
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Outer Lens: A Dark Tinted Black Shade made of polycarbonate, used to filter intense light during welding or cutting.
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Inner Lens: A clear polycarbonate lens that remains in place even when the front is flipped up, providing continuous impact protection.
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Ventilation & Fit: The green body is designed to provide a secure seal against the face, while integrated vents help manage airflow.
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Primary Use Cases: Ideal for gas welding, brazing, and oxy-fuel cutting.
Summary Comparison Table
| Feature | SMT-221 (Welding) | |
| Lens Type | Double / Flip-Up | |
| Main Color | Green Body & Black Frame | |
| Lens Shade | Dark Tinted Black & Clear | |
| Material | High-impact Plastic / Polycarbonate | |
| Ventilation | Indirect (Covered) |






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