One-piece lens and shaped side arms for fitting over prescription eyewear. Designed with a wide viewing angle Vented Temple, designed as a visitor spectacle Provides 99.9% UVA and UVB protection 12 per box, 300 per case Cert. Mod. CAN/CSA Z94.3:20 GENERAL SPECIFICATION: Lens Base: 4 Curve Overall Length (Lens-Tip): 165mm Overall Width (Hinge-Hinge): 155mm Weight: 47gm