104 pcs Optical Trial Lens Set Metal Rim Optometry Kit Case + Free Trial Frame. The diameter of metal rim lens :38mm. Science and technology care for your health. With 104 pcs of lenses inside, including 72 pcs of sphere lenses, 24 pcs of cylinder lenses, 4 pcs of prism, 4 pcs of accessories lens, 1 trial frame and other optometric accessories. The color of a free trial frame and free accessories are random.Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it's non-workdays, please kindly be patient and wait till Monday.