Laboratory Vacuum Filtration Pump For Usa Market There are three different tubing for connecting to different size nozzle of Laboratory Vacuum Filtration Distillation Apparatus. one unit 4mm ID x 5mm OD Transparent tube; one unit 5mm ID x 7mm OD black tubing; one unit 6mm ID x 9mm OD yellow tubing; The tubing is flexible so lab vacuum filtration pump can be suitable for different lab filter bottle in the market. Note: If you find the suction poor after receiving it, please contact me by email and I will replace it with a new one for you.NestEcho lab vacuum filtration pump is working for the Laboratory Vacuum Filtration Distillation Apparatus to filter the liquid quicker which can help to save a lot time.NOTE: The pump doesn't pull a high vacuum needed for much vacuum applications. It is intended to lower the pressure in a vacuum filtration flask. The working voltage of NestEcho laboratory filtration pump is 110-120V and the working HZ is 60HZ so It is made for USA market. (If you want to use this product in other country,please check the working voltage and working HZ to make sure whether it is suitable for the country you want to use for or not. There are three different tubing for connecting to different size nozzle of Laboratory Vacuum Filtration Distillation Apparatus. one unit 4mm ID x 5mm OD Transparent tube; one unit 5mm ID x 7mm OD black tubing; one unit 6mm ID x 9mm OD yellow tubing; The tubing is flexible so lab vacuum filtration pump can be suitable for different lab filter bottle in the market. The transparent tubing need to be pluged to the lab vacuum filtration and connect the black silicone tubing to the lab vacuum filtration and then turn the lab filter pump on in order to let the lab vacuum pump work.(the yellow tubing can be connected to the black tubing in order to connect to big size nozzle of laboratory vacuum filtration distillation apparatus) The lab vacuum pump product is made of plastic shell,Copper wire inside part and four Shockproof rubber base etc. The plastic shell can avoid rust.copper wire inside part makes the product more durable.The shockproof rubber base can reduce noise. You can barely hear the noise when the product is working.