Method Seven Classic HPS Clip On Grow Room Glasses Method Seven "Classic HPS Clip-Ons" change the way you see your plants and grow room using your own prescription glasses! Our Classic style clip-ons have high quality lenses with spring-loaded rubber coated metal clips that gently hold to your eyewear. This Classic style fits a wide variety of smaller or less shaped lenses. For larger lenses look at "The Aviator" Clip-on. Manufactured in Italy to our exacting standards by CARL ZEISS VISION. For use under HPS lighting. (See LED Clip-on models for LED lighting). SEE THE DIFFERENCE and treat yourself to QUALITY with the FIRST & BEST GROW ROOM GLASSES in the industry designed by Method Seven an OPTICS TECHNOLOGY company. Includes Microfiber Spectrum Art pouch that doubles as lens cleaning cloth.