Works with fiber optic connector cleaner. Nibs molded - not hand woven - sintered polymer material that wicks more than fabric-style swabs. 50 sticks (5 bags of 10 sticks). Application guide: Ferrule/Connector Size: 2.0mm; 1.6mm; Examples: Mil T 29504/14/15 for Mil C 28876; D4,Mil T 29504/04/05 for Mil C38999; For Cleaning Within Alignment Sleeves: (MCC-S16); Ferrule/Connector Size: Small Rectangular; Examples: MT-RJ (with or without pins); For Cleaning Within Alignment Sleeves/For Cleaning Exposed Ferrules -male: (MCC-S16).