Molymod crystal structure molecular model kits molymod mko 101 45 a molymod molecular model set showing the crystaline structure of graphitescales open ball amp stick models 25cm angstrom closed semi space filling models 15cm angstromatom parts range from 17 to 23mm in diameterbonds single bonds are represented by medium links 19mm and multiple bonds by longer flexible links 30mm for compact models bonds are represented by short links 2mmvalence represented by t