Black Diving Mask Scuba Diving Goggles, Waterproof Quick Adjustable Snorkeling Mask with Stainless Steel Frame and Tempered Glass Lens for Men and Women Size: 18*13*6cm Lens Material: 4mm thick tempered glass Material: PVC Headband: TPR material Steel Ring: Stainless Steel Frame with Tempered Glass Lens SAFE: Features a high-quality tempered glass lens that resists scratches and shattering, providing greater durability compared to plastic lenses EASY ADJUSTABLE BUCKLE: Quick-adjust pull strap system allows for easy customization of fit; secure buckle design holds strap firmly in place for comfort and stability during use DURABLE CONSTRUCTION: Built to withstand regular use in various underwater environments, from pool snorkeling to scuba diving INTEGRAL LENS DESIGN: Provides a wide, unobstructed view for enhanced underwater visibility Note: - Manual measurement may result in a size variation of 1-2cm - Color may vary slightly due to differences in screen displays Delivery Quantity: 1