Description General description Two-chamber glass apparatus are ideal for reaction scales of: • 0.1-1 mmol (total volume 20 mL) • 1.0-5.0 mmol (total volume 100 mL) • 5.0-20.0 mmol (total volume 400 mL) Each unit includes two screw caps, two stabilizing PTFE discs (recyclable), ten single use silicone/PTFE septa (in combination with the stabilizing discs each septum allows for a maximum of 2 piercings using 21G/Ø0.80 mm syringes or smaller). Order replacement PTFE/silicone septa STW3.