Kern ems series school balance precision balance kern ems 300 3 the kern ems 300 3 is an entry level school balance which is perfect for use in the biology chemistry or physics department of any school or university it features a large shock proof plastic weighing plate ergonomically optimised key pad and non slip rubber feet whats in the boxkern ems 300 3 weighing platemains power supplywindshieldinstruction manual kern ems 300 3 school balance 0001g 300g