Basic kit for biochemistry

carbon*12  (4 hole tetrahedral)
carbon*9  (3 hole, trigonal)
oxygen*11  (2 hole, angular)
oxygen*2  (1 hole)
nitrogen*3  (4 hole tetrahedral)
nitrogen*6  (3 hole trigonal)
nitrogen*2  (2 hole, angular)
sulphur*1  (2 hole, angular)
phosphorus*1  (4 hole, tetrahedral)
hydrogen*22  (1 hole)
hydrogen*3  (2 hole, angular)
Links-Bonds *40  (medium, grey).

All elements made of high quality durable plastic. Packed in a box.