100pcs / bag RJ45 Cat.5E Plug Solid 2Prong 6Micron. Solid wire consists of one piece of metal wire. Choose the same type of plug as the wire you are using. 6, 30, and 50 micron : Thickness of gold plating on contacts. The thicker, the better protection against corrosion and aging. While 6 micron is fine in office environment, we recommend 30 or 50 micron in dusty or chemical environment. Our patch cables are using 50 micron highest grade. 2 prong and 3 prong : When the plug is crimped, the contacts bite the wire like vampire. 2 Prong is 2 teeth so to speak, and 3 prong , 3 teeth. 3 prong has better bite (secure contact). Our highest grade is 50 micron, 3 prong.