Humvee Adventure Gear HMV-Db-Usmc Humvee Combat Knife Display 3.5" Usmc Combat Knife Display This Humvee Combat Neck Knife Display Box Is a 12 Piece Retail Display. The Knives Have 3.5" blades That Are Designed To Survive The Most Demanding situations While remaining Simple And Easy To Use. Blade Length: 3.5" Sheath: Yes Edge Type: Usmc Combat Knife Display Manufacturer: Humvee Accessories Mfg Number: HMV-Db-Usmc Model: Humvee Series: Combat Knife Display