Medium-Large Rectangular Head Clean-room Cleaning Swab Stick for DGT Inkjet Printers (Pack of 50) Our Clean-room Swab Stick is a general-purpose swab for cleaning Inkjet Printheads, Parking Caps, Wiper Blade Assembly and any hard-to-reach areas. It's closed-cell polyurethane foam head possesses excellent durability and cushioning and great absorbtion properties. A rigid internal paddle provides firm support. The large polypropylene handle enables good control and ease of use.