we supply all kind of cooling fan,dc fan,ac fan,the voltage from 5V, 12V,24V,48V,110V,220V.the size from 2cm to 17cm,and passed UL/CUL, TUV safety approval. DC FAN SIZE:)25 x 25 x10mm b)30 x 30 x 10mm c) 40 x 40 x 10mm d) 40 x 40 x 20mm e) 50 x 50 x 10mmf) 60 x 60 x 10mm g) 60 x 60 x 15mm h) 60 x 60 x 20mm i) 60 x 60 x 25mm j) 70 x 70 x 10mm k) 70 x 70 x 15mm l) 70 x 70 x 20mm m) 70 x 70 x 25mm n) 80 x 80 x 15mmo) 80 x 80 x 20mm p) 80 x 80 x 25mm q) 92 x 92 x 25mm r) 120 x 120 x 25mm 2) Rated voltage: DC 5V,12V,24V,48V 3) Type: ball bearing, sleeve bearing