Are you looking for professional, durable optics triangular prisms with stand? Are you in search of a sturdy, trustworthy optics teaching triangular prisms with stand that can serve you for a long term? , ! Our premium light refraction triangular prism with stand must meet your needs. Features -Color:As Shown -Material:Glass, plastic -Size:18.00X11.00X7.00cm/7.07X4.32X2.75in - This optical experiment apparatus triangular prisms is made of , durable and practical. - This professional triple prisms can fully show the characteristics of optical refraction. - It is very easy to operate, simple to use, making physical experiment learning more efficient. - It is conducive to improving children's academic performance by doing experience to learn the knowledge. - It is , useful and excellent, suitable for light physics teaching, practical and easy to use. Package list: 3 x Triangular Prism with Stand