BL14 N means number of plates. Length (mm): 206. Width (mm): 76. Thickness (mm): 10+2.3N. Weight (kg): 0.7+0.06N. Channel volume (L): 0.010(N-2). Exchange area (m2): 0.014(N-2). Working pressure: 3.0Mpa. Testing pressure: 4.5Mpa. Working pressure: -160grC ~ 225grCBL14A N means number of plates. Length (mm): 190. Width (mm): 80. Thickness (mm): 10+2.3N. Weight (kg): 0.9+0.06N. Channel volume (L): 0.010(N-2). Exchange area (m2): 0.014(N-2). Working pressure: 3.0Mpa. Testing pressure: 4.5Mpa. Working pressure: -160grC ~ 225grC