Stainless steel makes these small rectangular specs ultra-lightweight, but what really makes them stand out from the steampunk pack are the adjustable temples that slide to ensure the prefect fit. This frame is Optical quality which means it can be used for prescription lenses. If rectangular lenses are more your jam, checkout Eli's curvier counterpart, Kane. Both come in an array of industrial metals. polycarbonate lenses 100% UVA and UVB Protection RX optical quality FIT INFORMATION 33mm Eye Size 31mm Bridge 150mm Arm/Temple Height 7/8 Inches Width 4 Inches