Na'Vi Knife - Plastic - Avatar Way of Water - Costume Accessory - PropThis officially licensed Na'Vi Avatar accessory features a 10. 5" plastic knife and is full of detail with it's movie accurate design. Goes great with your Jake costume as the perfect add on for your costume for Halloween, cosplay, comic cons and more. Other Avatar costumes and accessories (wigs, theatrical makeup, weapon props) are sold separately on our page subject to availability.