The Lab-Tips® Large Knitted Polyester Swab (LTP125) makes an excellent selection for general purpose cleaning or surface sampling. The swab's durable flat head and rigid internal paddle provide maximum surface coverage. Berkshire’s knitted polyester swabs are made from cleanroom-laundered, continuous filament polyester, providing purity with low ionic contamination levels. The durable, absorbent knitted polyester cleaning swabs have excellent chemical resistance and are compatible with organic solvents.