It’s simple – it’s all in the paper. Our wick filters contain more paper than the competition. The quality of our paper has greater absorbency, lasts longer, and requires less energy to provide the same amount of humidification as the competition. The SGL1040 Super Wick is made right here in the USA under our high quality control standards. For use with AIRCARE/Essick Air Products models 3D6 100 (2 per unit); 5D6 700 (2 per unit); 7D6 100 (1 per unit); D46 720 (2 per unit); E27 000 (1 per unit); and E35 000 (1 per unit); CM330-series (1 per unit).