Carbon Replacement Pre-Filter For Honeywell 50250-S Air Purifier (3 Activated Carbon Pre-Filter pack) Perfectly fitted for Model 50250-S. No need to cut. It saves your effort and avoid messy job. The pre-filter has a dimension (mm) Length 1190 X Width 252 X Thickness 5. Keep trapping large particles in air and filter off such as dust, fibers, lints, puff, smoke. Keep in fresh and clean all the time, block the odors and particles and keep away Allergy and Hay fever. Correct using the pre-filter can optimize your Hepa Filter Life. The product does not come with the Hepa Filter.