stainless steel material size: diameter 17mm length:117mm weight:42g Effective: Water filter element can change ordinary clean water into Alkaline water with small molecular group and negative ion,which will greatly help our body.Put it into water and stir for a while,water will change amazingly. Usage: You can put it into cup,bucket or other vessels to improve water quality. It's a multi-function product The effect of making tea is better Don't use it together with acidic beverage. It will be more delicious if you use it to cook rice. Put our tourmaline micro-electrolysiswater producer(filter element) into tea cup or clean water within 3kg.Before drinking,pls keep our filter element in cold water for about 1mins Applications: constipation,jaded appetite,bellyache,abdominal distension,gastric ulcer,hypertension, coronary heart disease,fat,sleeplessness,nourish intestines and improves skin quality.and so on.Also used in subhealthy crowd. Attention: When you use it for the first time,pls put filter element in warm water for 20-30mins,which will wipe off mixed smell,clean it for sometime.Don't keep stick into water for a long time. Characteristics: 1) Tenis shape stainless steel design with lockage equipment.(Germs and impurity has positive charges which will activate with negative ion generated by filter element.With lockage design it's very convinient to clean. 2) Simply used,without install.And it fit all vessels 3) The way of producing water is various: you can put into 1.2-1.5L tea pot to heating and boiling.Also you can dip it into 300-500ml cool water and hot water. 4)Wide applicable scope:It can be used on running water,mineral water,purified water; 5)Long lifetime:One person can use it for 5years,filter 2000-5000L water. 6)Using our active water to brew tea,coffee,milk,fruit juice,wine and so on,they will taste mellow. 7)Active water,which has high negative potential,can eliminate senescence-free radical.Active water is the most convinient,effective and cheapest way to get rid of free radical.It's the best approach to prevent from senescence.