1. Filtering: Made of high quality filter materials, these replacement sponge filters effectively capture pollutants and prevent dust accumulation to maintain the proper functioning of your T1 dryer. The construction provides excellent filtration while being gentle on your device. 2. PERFECT FIT FOR T1 SERIES: These 207x157x30mm black sponge filters are specially designed for T1 series dryers (model 9164761), including TSD 443 WP, TSF 763 WP, 213 WP, TWF 640 WP, TCH630WP and TKB140WP models Check your model Compatibility before purchase. 3. Economical 5 Pack: This package includes 5 replacement sponge filter mats, which provide excellent value and convenience. Stock up and have spare parts ready when you need them. 4. REGULAR REPLACEMENT RECOMMENDED: These foam filters are consumables that should be replaced every 3 6 months to achieve optimal dryer performance. Regular maintenance extends the life of your valuable heat pump dryer and maintains its efficiency.