The Ultramarine by Extrema Ratio is a high end dive knife crafted for elite military service. The thick Bohler N690 stainless steel blade is coated with a Mil-C-13924 finish for a non-reflective, corrosion resistant finish. The dagger blade features partial serrations and an integrated strap cutter. Nylon wrapped handle provides a slip resistant grip. Included is scuba ankle sheath for ease of access.
$397.00 Original price was: $397.00.$96.99Current price is: $96.99.
- 7 Days of Hassle-Free Returns
- Safe Payments, Secure Personal Information
- Safe Transactions, Always
- Shop with Peace of Mind

| Overall Length | 11.625" |
|---|---|
| Color | Black |
| Best Use | Diving, Tactical |
| Country of Origin | Italy |
| Model | Ultramarine |
| Brand | Extrema Ratio |
| Knife Type | Fixed Blade |
| Sheath | Nylon |
| User | Right Hand, Left Hand |
| Weight | 13.90 oz. |
| Handle Material | Nylon |
| Blade Length | 5.875" |
| Handle Length | 5.75" |
| Edge Type | Serrated |
| Finish | Black |
| Blade Grind | Flat |
| Blade Style | Dagger |
| Hardness | 58 RC |
| Blade Material | Bohler N690 |
| Blade Thickness | 0.25" |
| Product Type | Knife |
Be the first to review “Extrema Ratio Ultramarine Fixed Blade Knife (5.875″ Black)” Cancel reply
Related products
Fixed Blades (Tactical)
Extrema Ratio N.K.3 Fixed Blade Tanto Neck Knife (2.75″ Stonewash)
Fixed Blades (Tactical)
Toor Knives Jank Shank Tactical Fixed Blade Knife White G-10 (3″ Black)
Fixed Blades (Tactical)
Stroup Knives Dagger Fixed Blade Knife Purple G-10 (5.25″ Black SW)
Fixed Blades (Tactical)
Extrema Ratio Defender Fixed Blade Knife Black Forprene (4″ Black)
Fixed Blades (Tactical)
Katz Knives Alley Kat Fixed Blade Knife Black Kraton (6.5″ Satin) 6006
Fixed Blades (Tactical)
Al Mar Quest Fixed Blade Knife Black TPR (14″ Satin) AMK5106
Fixed Blades (Tactical)
Remington F.A.S.T. Fixed Blade Knife Green (5.5″ Black Serr)
Fixed Blades (Tactical)
Toor Knives Jank Shank Teal Tactical Fixed Blade Knife (3″ CPM-S35VN)











Reviews
There are no reviews yet.