BRAND : SCHUMACHER MODEL : 1462-0146D DESCRIPTION : Bubblers use compressed air or an inert gas (usually nitrogen) introduced through a dip pipe called the bubble or sensing tube (which has an air flow restrictor at its end) immersed at a fixed depth into the vessel. ... Blockages can be minimized by keeping the pipe tip about 3inches from the bottom of the tank. Weight : 4 kg SPECIFICATION : NET WEIGHT : 1.75 KG STORAGE TEMPERATURE 40°C CONDITION : USED *TESTED , GOOD RUNNING CONDITION ( PRICE AS PER FOB PRICE ) ( PRICE IS NEGOTIABLE )