Economy series fiber optic patch cords. Designed to interconnect or cross connect fiber networks within structured cabling systems. Leviton can produce any standard or custom fiber patch cord to meet your needs and can offer quick-turn services for fast delivery. Multimode patch cords shall meet an optical return loss equal to or better than -25 dB per mated pair and single mode equal to or better than -50 dB for UPC polish or -55 dB for APC polish. Insertion loss shall not exceed 0.4 dB per mated pair for multimode and 0.35 dB for single mode.