Versatile pump that can be used two ways: manual pumping or manual priming to hands-free siphoning when the level of the supply container is higher than that of the receiving container. The siphon pump is made of plastic. The suction tube length is 33". The discharge tube length is 46". There is no assembly required, however, if necessary you can cut the tube the length of the container being used. Flushing the tube after use will extend the life of the tube. Liquids that evaporate to a residue, crystallize, thicken or harden may interfere with the pump performance. It is not advisable to use the pump for more than one type of chemical or for pumping hot liquids (hot to the touch). The handle can be pumped up and down or squeeze the top bulb repeatedly.