1.Hummer atomizer tank system,easy to refill. 2.Newly improved & unique atomizer. 3.Manufactured from thick durable tank style plastic. 4.100% no burning smell and leakage. 5.Compatible with Ego twist,ego-t,ego-c,ego-w,ego,510,510-t,etc. 6.Excellent throat hit, taste and vapor production. 7.can replace the vivi nova dct ce4