The "Fused NI 90 0.48" is a specific term used to describe a type of wire used primarily in the manufacture of resistors for electronic cigarettes and other vaporization devices. Let's dive into each component of the term for a better understanding:

Fused: This term is commonly used to describe a type of winding where two or more wires are twisted or wrapped together. This usually allows for a better heating surface and improved resistance performance.

NI 90: Here, "NI" refers to nickel, a metallic element. The "90" indicates that the wire is composed of 90% nickel. Nickel alloys are popular in the vape world because they offer good thermal and electrical conductivity, and withstand high temperatures generated during vaporization well. It is also less prone to oxidation compared to other materials, meaning it has a longer lifespan.

0.48: This number probably refers to the diameter of the wire, measured in millimeters. A 0.48 mm wire is considered to be of medium thickness, offering a balance between resistance and heating capacity.

In sum, the "Fused NI 90 0.48" is a resistive wire composed mainly of nickel, with two or more wires fused together, and having a diameter of 0.48 mm. It is used to manufacture resistors that, when powered by an energy source (like an electronic cigarette battery), heat and vaporize the liquid to produce inhalable vapor.