StarTech.com 30m (98.4ft) LC to LC (UPC) OS2 Single Mode Simplex Fiber Optic Cable, 9/125µm, 40G/100G, Bend Insensitive, Low Insertion Loss, LSZH Fiber Jumper Cord

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For £28.38 ex-VAT on a 30m LC to LC OS2 simplex lead, this is a pretty sensible “just works” option if you need a reliable single-mode jumper for patch panels, test setups, or short-to-medium runs within a rack/cabinet. The UPC polish and the “bend insensitive”/low-loss positioning are exactly what you want in the real world where people coil cables too tightly, route them past tight edges, or just don’t baby the cabling. If your use case is 100G/40G style optics over single-mode and you’re after predictable performance rather than exotic brand-marketing, this is the sort of economical, low-risk cable I’d keep in the spares cupboard.

I’d be a bit cautious if you’re doing something more demanding than normal data centre patching (or if you’re expecting it to replace a properly planned fibre route). At 30m you can still get degradation if the network design is already marginal, and with fibre you don’t want “good enough” where the budget optics link margin is tight—verify the link budget against your transceivers and loss expectations. Also, since it’s simplex, only buy it when your design calls for simplex (not the common duplex pair) — otherwise you’ll just end up paying twice to correct it. Overall: good value for day-to-day SMF patching/jumper needs; not the one I’d pick if you need to engineer around tight link margins or require duplex.