300 & 300P Gehmann frames Shooting Glasses with Adjustable side-bars The frame is set according to the width of your face by locating the side bars in one of the three holes at the end of the crossbar-Nose-bridge is adjustable for height-Sliding mount sets holder position on the crossbar plus up or down angle-Supplied in free carry case 985-Super Comfortable with Soft Sprung EarpiecesContact us at 70822-33324, if the product is in pre-order status