HWF100 Holmes "E" Humidifier Wick Filter Bionaire BWF100 Sunbeam SF235 3 Pack Measures approximately 5.25 x 7.63 x 1.25 Material:Wood pulp paper 3 wick filters per box! For optimum performance, replace filter at the beginning of each season or every 2 months depending on use This is an aftermarket filter not made by Holmes Description: Compatible with:Holmes:HM4600, HM6000, HM6000RC, HM6005, HM7203, HM7203RC, HM630, HM729, HM729G, HM7203, HM7203RV, HM7204, HM7808, HM7305,HM7305RC, HM7305RCU, HM7306, HM7306RC, HM7405, HM7405RC, HM7405RCU; Fits Bionaire model BCM6610RC BCM646 BCM600 BCM4655 BCM655 BCM7255 BCM7308 BCM7205 BCM7207 BCM7306 BCM7307 BCM6010RC BCM630 BCM645 BCM657 BCM658 BCM5520 BCM5520RC BCM5521 BCM4600 BCM5520RCU BCM6000 BCM6010 BCM7203 BCM7203RC BCM7204 BCM7305 BCM7305RC BCM7305RCB and BCM7309 Replace for Holmes Type E HWF100-UC3