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Bulk Fiber

Bulk Fiber Optic Cable — Data Communication Backbone, Trunk & Indoor/Outdoor Fiber
Singlemode & Multimode • OS1/OS2 & OM1/OM2/OM3/OM4/OM5 • Indoor/Outdoor • Riser/Plenum • Armored & Direct Burial Options

Shop our selection of bulk fiber optic cable engineered for high‑speed data communications in enterprise networks, data centers, campus backbones, and industrial environments. This category includes singlemode and multimode bulk fiber in common constructions for patch/IDF/MDF interconnects, tray runs, conduits, and longer backbone pulls. Choose the right fiber type and rating for your application: OS2 for long-reach links, or OM3/OM4/OM5 for high-density short-reach data center uplinks. Select a jacket rating that matches your pathway (OFNR riser, OFNP plenum, or indoor/outdoor), and pick the construction you need (tight-buffered, loose-tube, armored, or direct burial).

Why choose Gruber
  • Spec-correct selection — OS/OM grades, jacket ratings, and constructions listed clearly.
  • Data-center practical — trunk, backbone, and pull-friendly options for clean installs.
  • Custom cuts & kitting — we can do custom lengths and staged reels for multi-run projects.
  • Real support — tell us distance, transceivers, pathway, and termination plan and we’ll help you match the right fiber.

Tip: Confirm SM vs MM, choose the correct OS/OM grade, verify plenum/riser requirements, and plan for proper bend radius and termination method (splicing, pigtails, or pre-terminated trunks).

Cut-to-Length Service — We’ll Cut Any Spool to Your Exact Footage

Need a custom length? We can cut bulk wire directly from the spool to the exact footage you choose.
Add your desired length in the order notes (or contact us) and we’ll confirm total cut charges before processing.

Cut Service Fee Rate How It’s Applied
$55 setup charge $0.065 per foot One-time setup + per-foot charge based on your requested length

Example: 500 ft cut = $55 + (500 × $0.065) = $87.50.

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Acronym Dictionary — Bulk Fiber Optic Listings

Acronym Meaning
SM Singlemode fiber (long-reach links; typically 9/125‑µm core/cladding).
MM Multimode fiber (short-reach, high bandwidth; typically 50/125 or 62.5/125‑µm).
OS1 Singlemode grade optimized for indoor/controlled environments (often tight-buffered indoor builds).
OS2 Singlemode grade optimized for outdoor/long-reach links (lower attenuation; common for campus/backbone).
OM1 Multimode 62.5/125‑µm (legacy indoor networks).
OM2 Multimode 50/125‑µm (legacy/utility MM).
OM3 Laser-optimized 50/125‑µm MM (common for 10G/40G/100G short reach).
OM4 Higher-bandwidth OM3-class MM for longer short-reach data center runs.
OM5 Wideband multimode supporting multiple wavelengths (SWDM) for expanded short-reach capacity.
OFNR Optical Fiber Nonconductive Riser rating (vertical pathways between floors).
OFNP Optical Fiber Nonconductive Plenum rating (air-handling spaces; low-smoke jacket).
I/O Indoor/Outdoor rated (jacket suitable for both building entry and exterior pathways).
TB Tight-buffered fiber construction (often used indoors; easier breakout/termination).
LT Loose-tube construction (often used outdoors/backbone; fibers protected in tubes).
Armored Added mechanical protection (metallic or dielectric armor) for crush/rodent resistance.
DB Direct Burial (construction intended for burial/wet environments; confirm gel/water-block features).
UL Underwriters Laboratories listing/recognition (safety compliance marking).
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