The 120 * 120 DC fans have two specifications of 12025 and 12038. The length, height and width are 120mm and the thickness is 25 and 38. Here are the air volume parameters of the two DC fans.

Df1225b12l: voltage 12V, current 0.12A, power 1.44w, speed 1500, air volume 51.39cfm, wind pressure 0.06inh2o, noise 27dba

Df1225b12m: voltage 12V, current 0.23a, power 2.76w, speed 2100, air volume 70.69cfm, wind pressure 0.12inh2o, noise 35.5dba

Df1225b12h: voltage 12V, current 0.38a, power 4.56w, rotational speed 2700, air volume 89.94cfm, wind pressure 0.20inh2o, noise 42.3dba

Df1225b12v: voltage 12V, current 0.50a, power 6.00w, speed 3300, air volume 113.31cfm, wind pressure 0.32inh2o, noise 49.6dba

Df1225b24l: voltage 24 V, current 0.06a, power 1.44w, speed 1500, air volume 51.39cfm, wind pressure 0.06inh2o, noise 27.0dba

Df1225b24m: voltage 24 V, current 0.12A, power 2.88w, speed 2100, air volume 70.69cfm, wind pressure 0.12inh2o, noise 35.5dba

Df1225b24h: voltage 24 V, current 0.19a, power 4.56w, speed 2700, air volume 89.94cfm, wind pressure 0.20inh2o, noise 42.3dba

Df1225b24v: voltage 24 V, current 0.25A, power 6.00w, speed 3300, air volume 113.31cfm, wind pressure 0.32inh2o, noise 49.6dba

Df1238b12l: voltage 12V, current 0.32A, power 3.84w, speed 2600, air volume 109.41cfm, wind pressure 0.31inh2o, noise 40.0dba

Df1238b12m: voltage 12V, current 0.76a, power 9.12w, rotational speed 3600, air volume 149.93cfm, wind pressure 0.58inh2o, noise 51.0dba

Df1238b12h: voltage 12V, current 1.55a, power 18.60w, rotational speed 4600, air volume 190.45cfm, wind pressure 0.93inh2o, noise 55.4dba

Df1238b12v: voltage 12V, current 2.90a, power 34.80w, speed 5600, air volume 230.96cfm, wind pressure 1.37inh2o, noise 62dba

Df1238b24l: voltage 24 V, current 0.20a, power 4.80w, speed 2600, air volume 109.41cfm, wind pressure 0.31inh2o, noise 40.0dba

Df1238b24m: voltage 24 V, current 0.38a, power 9.12w, speed 3600, air volume 149.93cfm, wind pressure 0.58inh2o, noise 51.0dba

Df1238b24h: voltage 24 V, current 0.68a, power 16.32w, speed 4600, air volume 190.45cfm, wind pressure 0.93inh2o, noise 55.4dba

Df1238b24v: voltage 24 V, current 1.30a, power 31.20w, speed 5600, air volume 230.96cfm, wind pressure 1.37inh2o, noise 62dba

Df1238b48l: voltage 48V, current 0.12A, power 5.76w, speed 2600, air volume 109.41cfm, wind pressure 0.31inh2o, noise 40.0dba

Df1238b48m: voltage 48V, current 0.23a, power 11.04w, rotational speed 3600, air volume 149.93cfm, wind pressure 0.58inh2o, noise 51.0dba

Df1238b48h: voltage 48V, current 0.42a, power 20.16w, rotational speed 4600, air volume 190.45cfm, wind pressure 0.93inh2o, noise 55.4dba

Df1238b48v: voltage 48V, current 0.68a, power 32.64w, speed 5600, air volume 230.96cfm, wind pressure 1.37inh2o, noise 62dba