All 2306 series foam mini-tip swabs are manufactured with 100 pores per inch reticulated polyurethane foam, which ensures excellent absorbency while minimizing contamination. Tips are affixed by heat seal to prevent tip loss, even while saturated with solvent. - Flexible tips provide versatility and softer touch, while rigid heads allow for more aggressive cleaning. 2306 swab is Techspray's most popular foam swab. Good for general purpose coating and cleaning.