The nozzle and HeatBreak in one unit, Easy Install. Color-coded silicone sleeve identifies nozzle sizes conveniently. Rapid heating and efficient heat dissipation. International brass process, good thermal conductivity, high hardness, fast heat dissipation. Smooth inner wall of the nozzle, no burrs, small viscosity coefficient, and smoother the wire output. Each Nozzle is a preassembled nozzle and HeatBreak in one unit, so there's no hazardous hot tightening and no chance of incorrect assembly. Filament Diameter : 1.75mm Max Temperature : 300℃ Colour:Photo Color Material:Brass + titanium + silicone type:0.8mm, green/0.25mm, yellow/0.4mm, red/0.6mm, blue Package Contents: 1 x Heatbreak Brass Titanium Nozzle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.