Fineline Needle Applicators are stainless steel applicators that use the FL air-tight non-clogging cap wire closure system to insure that the applicator and your preferred media are always ready for immediate use.
Size 18 fits most 1 ounce bottles
Size 20 fits most 1 ounce and 2 ounce bottles.
Size 24 fits most 4 ounce and 6 ounce bottles.
The number after the slash refers to the threading on the inside of the cap. Size 410 is universal and fits most craft bottles.
