http://www.meditechswab.com/products/cleanroom-foam-swabs/Spiral pointed conical swabs:

The Large rectangular foam head swab FS707 is a tool for any type of cleaning, including those that require high absorbency, low particle generation, and uniform dispersing of solvent.

The large rectangular foam head swab FS707 is an excellent choice for cleaning on thermal print head, inkjet print head, check scanner, reader transport rollers, opto-electronic sensors, automotive parts, firearm and gun, prepared surfaces in aerospace and much more.

FS707 Basic Info

Swab Head Material: 100 PPI closed-cell polyurethane foam

Swab Handle Material: 100% polypropylene

Handle Color: Green/White

Swab Construction: Thermally sealed and attached

ISO Class: Class 100 Cleanroom