CNAweb 12 Port UL Listed Cat5e 1U Rackmount 110 RJ45 Patch Panel 568A 568B Standard 19" width and 1U (1 3/4" height) 568 A/B color coded punch down blocks with 22-26 AWG 110 style wiring Numbered ports for clear port identification Meets TIA/EIA-568B.2/568B.2-1 Cat5e ISO/IEC 11801 and EN 50173-1 specifications UL certified and listed (UL1863) and RoHS compliant.