FieldShield Direct Bury 10/6 mm Microduct is a durable, crush resistant fiber duct product designed to increase the protection of fiber while decreasing installation and maintenance expenses. Manufactured using high density polyethylene (HDPE), FieldShield Direct Bury Microduct offers superior durability and protection.

Technical Specifications

Length 2,000 feet (609.60 m) per spool (-0 / +5%)
Outside Diameter 0.394" (10.01 mm); Oversheathed Toneable 0.500 (12.70 mm)
Inside Diameter 0.246" (6.25 mm)
Wall Thickness 0.074" (1.88 mm)
Slip Layer Minimum 0.004" (0.102 mm)
Ovality ≤ 5%
Installation Tension 340 lbf
Bend-Radius Non-toneable: 6" radius minimum; Toneable: 7” radius minimum
Material High Density Polyethylene (HDPE)
Operating Temperature -40°F to 176°F (-40°C to 80°C)
Installation Temperature -14°F to 158°F (-26°C to 70°C)
Color Orange and Black
Tone Wire Insulated Copper
Tone Wire Diameter 0.032” (0.813 mm) / 20 AWG
Markings Part number, lot number, footage markers every two feet
Spool Size 12” ID x 24” OD x 20” W (304.80 mm x 609.60 mm x 508.00 mm)
Weight Non-toneable: 71 lbs (32.21 kg); Toneable: 78 lbs (35.38 kg)

Features & Benefits


  • Compliant to Telcordia GR-3155


  • Quick and easy to install
  • Direct Bury Microduct has high tensile strength and crush resistance that withstands all types of ground implementations including open trenching, vibratory plowing, micro-trenching and directional boring
  • Made from HDPE to prevent degradation


  • Optional external tone wire simplifies ground locating
  • Industry standard orange provides high visibility for direct bury applications
  • Standard nylon pull string simplifies deployment of fiber
  • Smooth core slip lining reduces drag co-efficient enabling fiber to be pushed or pulled with minimal resistance
  • Optional black color available to couple direct bury orange to a more aesthetically pleasing black color as it transitions above ground on the side of a living unit


  • Maximizes capacity of existing conduit previously considered exhausted
  • Provides industry leading protection for “last mile” feeds