Greenlee 39261 Flexible Mandrel, 3.0 in.
The Greenlee 39261 Flexible Mandrel is a 3.0-inch diameter proofing tool used to verify conduit bore clearance before conductor installation. Passing a mandrel through conduit prior to wire pulls is an industry-standard practice to identify potential obstructions, misaligned couplings, or crushed sections.
Specifications
- Diameter: 3.0 inches
- Type: Flexible Mandrel
- Manufacturer: Greenlee
Features
- Flexible body navigates conduit bends and offsets
- Proofs conduit runs for clear bore before expensive conductor pulls
- Identifies misalignments, obstructions, or damaged conduit sections
- Reduces risk of costly wire damage during installation
Applications
Used on commercial and industrial construction projects to proof 3-inch conduit prior to wire pulling. An essential pre-pull step to confirm conduit system integrity and protect conductor investments.


