Single Vision Prescription Lenses Included - FREE! Upgraded to Polycarbonate Lenses - FREE! Thinner and lighter than basic lenses Blocks 100% UVA/B 100% Money Back Guarantee Easy Returns What the "P" means The P in the model number means the side shields are permanently attached. They're built into the frame rather than clipped on, so they can't be removed, lost, or left in a drawer — the frame stays ANSI Z87.1 compliant every time it's worn. Frame Specifications Front / Temple Material: Stainless Steel Side Shields: Permanently attached (integrated) Safety Rating: ANSI Z87.1-2010 and CSA Z94.3-07 Available Sizes: 56-18-140 and 59-18-145 Available Colors: Black, Brown Fit: Men's How this frame measures up ArmouRx 3001P — frame measurementsSize 56-18-140Total frame width • 130 mmB • 36.3 mmA • 56 mmDBL 18Temple length 140 mmSize 59-18-145Total frame width • 136 mmB • 38.1 mmA • 59 mmDBL 18Temple length 145 mmA = lens width · B = lens height · DBL = bridge widthDiagrams are drawn to scale relative to one another. *Pricing applies to orders placed online only