This affordable double-concave (also called bi-concave) lens is made of high-quality clear optical glass and is excellent for classroom optics experiments. It has a 50 mm (approx 2 inches) diameter and 15cm (approx 6 inches) focal length.
Welcome to xUmp.com, your one-stop shop for all your scientific and STEM needs! Our extensive selection of science supplies has been carefully curated by real scientists and educators, ensuring that you'll find only the best and most educational products on our site. Whether you're a teacher looking for classroom supplies, a student gearing up for a science fair, or a science enthusiast looking for the perfect gift, we've got you covered. From chemistry glassware and lab equipment to robots and science kits, we have everything you need to explore the exciting world of science. Browse our store today and discover the wonder of science!