Mac Apnea 9 Carbon Dive Knife
The Mac Apnea 9 Carbon Dive Knife has been specially designed for spearfishing, the knife has a speargun shaft removal tool and a loophole for attaching a lanyard built into the knife.
Made in Italy from high-quality nitrogen stainless steel
Apnea 9 Carbon Specs
- Blade: Nitrogen stainless steel – W 1.4060
- Hardness: 55-56HRC
- Thickness: 4 mm – 0.15”
- Weight: 85 g – 2.99 oz
- Blade coating: PTFE Rosso
- Knife length: 18 cm – 7.08″
- Blade length: 7cm – 2.75″
- Sheath Weight: 14 g – 0.49 oz
Nitrogen stainless steel
Nitrogen alloyed improves austenite stability, mechanical properties and corrosion resistance. Steels supersaturated with nitrogen have been investigated, which rival the latest ferritic steels in strength and have greater toughness.
What is PTFE
Teflon is certainly easier to say than polytetrafluoroethylene, its scientific name. Like many long and complicated names, polytetrafluoroethylene was shortened to the acronym PTFE.

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