QSFP-40G-SR4 Arista 40GBASE-SR4 QSFP+ Transceiver, up to 100m over OM3 MMF or 150m over OM4 MMF Refurbished Promo! from 1500 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available.