STK - set of HTS compounds which are available for prompt delivery. It is Vitas-M Lab's stock collection. Compounds are available in amounts from 1 mg and up to 350 mg - more than 1 000 000 ps.

TBB - set of Building Blocks for Combinatorial chemistry. All these items are also available  for prompt delivery. Compounds are available in amounts from 500 mg and up to 10-15g.