Hello. I'm from SEMIKO. We produce instruments for chemical laboratories. www.semico.ru We need solenoid pinch valves. 12V Normally closed Tube OD 3.5 mm (can be 3mm ... 4mm) How can I get a sample? 5 or 10 pieces. Thank you. Yuriy. +79231319208 Russian Federation, Novosibirsk Show More