Organic Chemistry Molecular Model Kit Set for Ochem Students with User Guide - 140 Pieces Receive an 8 Page Illustrated user guide filled with helpful information Includes 140 pieces (50 high quality atom parts and 90 links) providing hands-on learning experience of molecular structures and functional groups Atoms are color-coded to universal standards making identification easy This set contains a link removal tool making disassembly a breeze Sturdy plastic box included with four compartments designed for portability, organization and storage