Amphenol 1m QSFP+ (QSFP Plus) 40GBASE-CR4 qualified passive copper cables provide next generation performance by combining four 10 Gb/s SFP+ channels into one affordable high-density package. Our QSFP+ cables integrate a new 40G Ethernet-optimized 38-position ?board-as-connector? design with zinc die-cast backshells for superior EMI resistance, minimal insertion loss, and improved cross-talk performance. Featuring 31 AWG ultra-flexible Amphenol Spectra-Strip SKEWCLEAR? EXF 8-pair wire construction for bandwidth-intense applications including QDR InfiniBand, 40G Fiber Channel, 40-Gigabit Ethernet (40GBASE-CR4), SAS, and SONET. Each 1m (3.3-ft) length QSFP+ cable goes through a rigorous assembly and test procedure aimed at eliminating unnecessary signal loss..