Complete hydrogenation unit for working volumes of 1mL to 200mL. Complete unit contains: (1) 120v 60Hz hydrogenation unit, (6) glass vessels: (1) 9mL with #7 Ace-Thred, (1) 16mL with #7 Ace-Thred, (1) 46mL with #7 Ace-Thred, (1) 77mL with #25 Ace-Thred, (1)180mL with #25 Ace-Thred, and (1) 335mL with #25 Ace-Thred, (1) #7 nylon spacer bushing, (1) #7 nylon big head bushing, (1) #7 - #25 PTFE adapter, (1) upper rubber bumper pad, (1) lower rubber bumper pad, and (1) aluminum mounting frame.