Treated with Microban Antimicrobial Product Protection built into the sponge. Fights odor-causing bacteria, mold and mildew. Front scrubber removes scuff marks & stubborn stains. Hydrophilic sponge. Automatic squeezing action makes wringing a breeze. 48" powder coated steel handle with hang-up feature. Uses Type H No.0472 (SKU 915.4105) and 0473 refill. Fully threaded posts ensure maximum security of mop refills to mop head assembly. No loosening of thumb screws ? prevents sponge refills from falling off.