Keep your Max4s nozzle-cleaning system working properly with this 5-pack of genuine QIDI Wiper Silicone Cases. These OEM replacement silicone components fit the Max4 nozzle-wiper assembly and help support consistent removal of filament residue before printing. A useful maintenance spare for replacing worn, damaged, or contaminated wiper cases before they start causing messy nozzle cleans and unreliable first layers.