Launderable microfiber dusters fit our flat flex frame/extension handle and are perfect for dusting where other tools can't reach. Microfiber/polypropylene blends. FF20MOP is our better sleeve, 70/30 yarn blend, wrap knitted weave it is our most economical sleeve and is blue. FF20MOP-TS is our best sleeve, 70/30 yarn blend, wrap knit weave and has the most dust pick up, and is black and white. FF20FRC flat flex frame is 27 1/2" L. Bendable high density foam with plastic handle. Handle has special plastic connector allowing ACME threaded handles. FF20MOP-P Is our best sleeve, 100% polyester. Launder, vacuum or shake to clean. MFL-FF20-MOP-GR is our superior sleeve, 100% microfiber and looped construction.