Unused 6mm thick medium-sized leaf spring for Kue/GT, rod keeper type

I previously purchased this item here, but it didn't fit with the one I already had, so I decided to replace it.
There may be minor scratches from storage.

The following is a quote from the original product description:

[Product Description]
Medium Spring Plate - Lightweight & Durable 2025 Model
A spring plate for standing fishing, targeting deep-sea fishing, Tamon, and 10kg class Grouper.
Made entirely of stainless steel for both lightweight and durability.
It is designed for practical use and supports the attachment of spinning reels.
It is easy to attach to a rod keeper, and the spring plate can be quickly detached by simply lifting the rod.

[Product Contents]
• Spring plate body (6mm thick / SUS304)
*Detachable trigger design for rod keeper attachment

[Compatible Rods/Fish]
・Compatible Rods: 30 to 70 Gou
・Target Fish: Large Garra, Tamon, 10kg class Grouper

[Dimensions/Specifications]
・Total Length: 500mm
・Effective Mounting Length: 350mm
・Body Weight: 1.85kg
・Thickness: 6mm
・Width: 40mm
・Material: All Stainless Steel (SUS304) Polished Finish

[Product Features]
・All Stainless Steel (SUS304) Construction
→ Highly resistant to salt damage and excellent durability!

・Lightweight Design
→ Comfortable for long periods of use!

・Compatible with Rod Keepers
→ Can be attached to commercially available rod holders!

・Automatic Detachment Function
→ Easily detach the rod with a single touch!

・6mm Thick Powerful Spring
→ Provides the necessary rebound force to handle strong runs!

[Purchase Notes]
・A commercially available rod holder is required for installation.
・When attaching the rod, it can be instantly detached with the one-touch trigger.