Tie Top Pin
- Compatible with Covered or Bare conductors
- Durable – Impact Resistant
- Light Weight – UV Stabilized Polyethylene
- Safer – Shatter proof design
Vise Top Line Post
Secure, consistent conductor grip with durable HDPE construction for covered or bare wire.
Built for Simplified Line Performance
Secure conductor retention without traditional tie wires.
Vise Top Line Post Insulators combine conductor support, electrical insulation, and mechanical retention in one streamlined design. The integrated vise-top system simplifies installation while providing dependable performance for new construction, retrofit, and system-hardening applications.
Designed for the Field
- Supports bare and covered conductors
- Integrated design eliminates tie wires and related hardware
- Direct replacement for traditional porcelain insulators
- Lightweight, durable polyethylene construction
- Resists impact, weathering, and UV exposure
- Ideal for reliability and system-hardening projects
Proven Performance. Trusted Reliability.
We pioneered HDPE distribution insulators nearly six decades. Today, utilities around the world trust our polymer insulators for lightweight construction, exceptional durability, and dependable performance across demanding overhead distribution systems.
Lightweight Construction
Up to 90% lighter than porcelain for easier handling, safer installations, and improved crew productivity.
Made in the USA
Manufactured domestically and compliant with Buy America Build America (BABA) requirements.
Impact-Resistant Design
HDPE construction resists cracking, chipping, and brittle failure for dependable performance in demanding environments.
Field-Proven Since 1965
Trusted by utilities worldwide for nearly six decades of reliable overhead distribution performance.
Compare to Other Insulator Designs
Clamp Top Line Post
- Compatible with Bare conductors
- Durable – Impact Resistant
- Light Weight – UV Stabilized Polyethylene
- Exceeds ANSI electrical and mechanical requirements
Vise Top Pin
- Compatible with Covered or Bare conductors
- Proper & Consistent Gripping Strength
- SKU Reduction -No Need for Tie Wire
- Durable – Impact Resistant
- Light Weight – UV Stabilized Polyethylene
Vise Top Line Post Insulator Spec Sheets
Part Number
Description
Voltage
ANSI Class
Neck Size
Pin Size (in)
Spec Sheet
HPI-15VTP
with plastic inserts for use on covered & bare aluminum or copper conductors
15kV
55-3, 55-4
C
1
HPI-25VTP-01
with plastic inserts for use on covered & bare aluminum or copper conductors
25kV
55-5
F
1
HPI-25VTP-02
with plastic inserts for use on covered & bare aluminum or copper conductors
25kV
56-1
F
1-3/8
HPI-35VTP-01
with plastic inserts for use on covered & bare aluminum or copper conductors
35kV
55-6
F
1
HPI-35VTP-02
with plastic inserts for use on covered & bare aluminum or copper conductors
35kV
55-7
F
1-3/8
Talk To An Expert At Marmon Utility