These designer prescription glasses are made to accommodate most prescription lenses.Made of plastic, otherwise known as cellulose acetate, or zyl, the frame can be easily adjusted for a perfect fit with your prescription lenses. Your frame purchase includes free standard shipping charges, and manufacturer packaging. You can add doctor verified prescription lenses, add custom polarized lenses, and many other lens options if you desire them. Like all Stepper products, the Stepper Stepper 30048 SI provides the sophisticated and classic look that we all need. Stepper Stepper 30048 SI frames have a rectangle shape, which helps to balance rounded facial features. Frame shape is the most noticeable feature of a pair of glasses, followed by frame color and frame size. Top brands always have a large collection of rectangle frame shape glasses, as well as oval frame shape glasses.Stepper Stepper 30048 SI frames feature a fashionable full frame design, which is the largest component of designer eyeglasses brands collections. A rim all the way around the lenses, provides for maximum stability and durability.The frame has a Universal.Designed for adults, this model has a Regular type hinge for greater comfort.Standard skull temples can be easily adjusted to fit perfectly behind your ears.Lifetime warranty on manufacturer's defects. The warrantee by the manufacturer covers manufacturer's defects for the frame. As an online optical superstore, we can help to process a warrantee for you with the manufacturer, according to their return policy. See all Stepper Stepper Glasses Stepper Glasses are made by Stepper Eyewear, founded 1970 in Germany by Hans Stepper (Optician) and Bernhard Ide (Mechanical Engineer) and named Stepper & Ide. The target was to develop and manufacture moulded spectacle glasses frames of high quality. In the 1970's moulding was recognized as an inferior technology for optical frames because only very cheap eyeglasses were made in that way. After some years of experimenting the new moulded product was well received by the market and Stepper Eyewear became known internationally as a manufacturer of good fitting, comfortable glasses and eyeglasses. However, in the 1990's increasing costs forced the company out of Germany and, after an intermezzo in England, STEPPER Eyewear was taken over by ARTS Optical in Hong Kong as the major part of ARTS' brand business. With access to the latest technologies and experienced manpower, STEPPER is fast growing brands in the portfolio of “EyeConcept”.