description:<br /><br />physical science optical experiments<br /><br />item specifics:<br />user manual (only chinese version)<br />box size: 23.2 x 16 x 5cm<br /><br />package including:<br />1 x laser beam generator<br />1 x triangular prism<br />1 x convex lens<br />1 x biconvex lens<br />2 x square lens(different size)<br />1 x negative meniscus lens<br />1 x spherical lens<br />2 x mirrors<br />1 x magnifier<br />1 x water channel<br />3 x chesses<br />2 x batteries<br />1 x instructions<br /><br />note:<br />1.please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid.<br />2.the colors may have different as the difference display， please understand.