Reaction-tube (10 mL) ideal for in-situ hydroxy-carbonylations using SilaCO (reaction scale up to 1 mmol), one screw cap, one stabilizing PTFE discs (recyclable). Ten single use silicone/PTFE seals (in combination with the stabilizing discs each seal allows for a maximum of 2 piercings using 21G/Ø0.80...