is the d ring metal or plastic?

Hey Steve, it's a metal D ring. Sturdy as hell too, I bought 6 of these and have had no issues with any of them.

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StarTech.com CMHOOK1UN 1U Vertical Server Rack Cable Management D-Ring Hook - 1.8x3.9in (4.5x10cm)

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Style: 1.8 x 3.9in

1.8 x 3.9in
2.2 x 3.9in
2.4 x 3.9in - Multi-Directional

CMHOOK1UN
Black

Overview

Specs

Reviews (5)

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Add a cable management hook to your server rack or cabinet for strain relief and

Model
Brand	StarTech.com
Model	CMHOOK1UN

Details
Type	Cable Management
Color	Black
Specifications	Industry Standards: EIA RS310-D U Height: 1U Enclosure Type: Steel External Height: 2.2 in [57 mm] External Width: 4 in [101.3 mm] Internal Height: 2 in [50.6 mm] Internal Width: 3.6 in [92.6 mm]

Features
Features	Route cables neatly through your rack with an easy-to-install cable management ring Increase the longevity of your server and networking equipment interfaces by providing cable strain relief

Additional Information
First Listed on Newegg	November 11, 2018

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StarTech.com CMHOOK1UN 1U Vertical Server Rack Cable Management D-Ring Hook - 1.8x3.9in (4.5x10cm)

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Item#: 9SIA1K68CK9943

Best Sellers

Meet Your Seller

StarTech.com CMHOOK1UN 1U Vertical Server Rack Cable Management D-Ring Hook - 1.8x3.9in (4.5x10cm)

Learn more about the STARTECH CMHOOK1UN

Customer Reviews of the STARTECH CMHOOK1UN

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info