Description General description This molecular model set is priced to allow each student to make his or her own models. In addition to the elemental models (Hydrogen, Chlorine, Oxygen, Nitrogen), students can construct models of hydrides, halides, metal oxides and hydroxides, non-metal oxides and acids, and salts. Comes complete with clearly illustrated instructions. The individual set is packaged in a plastic storage bag. The package of six sets comes with a plastic storage box and six separate bags. Contents: 1 Black Carbon 4-hole 4 White Hydrogen 1-hole 2 Blue Nitrogen 3-hole 3 Red Oxygen 2-hole 1 Yellow Sulfur 6-hole 1 Purple Phosphorous 3-hole 2 Green Halogen 1-hole 2 Gray "metal" 6-hole 1 Brown dsp3 5-hole 10 Medium Gray Links 6 Long Flexible Gray Links 4 Medium Purple Links Top quality Molymod molecular model sets are for use by students, teachers, and researchers. May be upgraded or customized with additional model parts, for more info, go to sigma-aldrich.com and enter Molymod in our search engine. Scale is 2.8 cm =100 pm (open style) and 1.45 cm = 100 pm (compact, semi-space-filling). Sets include standard color-coded plastic atom centers (with bond holes set at the appropriate angles), bonding links, and a plastic storage box. Set pictured is representative of the Student set. See our Selection Guide for detailed descriptions of set contents. Legal Information Molymod is a registered trademark of Spiring Enterprises Ltd.