The Molymod® Molecular Model Set manufactured by Spiring Enterprises Ltd. contains: 12 black tetrahedral carbon atom parts 6 red 2-hole angular oxygen atom parts 20 white single-hole hydrogen atom parts 4 blue nitrogen atom parts 2 yellow sulfur atom parts 1 purple tetrahedral phosphorus atom part 4 green single-hole halogen atom parts 1 grey single-hole metal atom parts 26 medium-length 19 mm grey links 12 flexible long 30 mm grey links 26 short 2 mm white links Link remover tool Storage box Instructions