Usage Tips:Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you!, Plastic box random, don't accept the specified [Heat Set Insert Tips Tool] 1 hot iron heating rod and 5 tips heat-set inserts M2 M2.5 M3 M4 M5 M6. M2 and M2.5 share a common tip [Multiple Standard Sizes] In this kit, you will get 360pcs M2 M2.5 M3 M4 M5 M6 female knurled nuts in different lengths, total 15 sizes. Super large quantity and various sizes can meet your needs to install numerous 3D printing accessories. [Great Performance] Thanks to the outside oblique threads, it holds firmly in the pressure part and ensuring a high balanced tightening, once heated plastic around the brass sleeve nuts cools and hardens, the threaded nuts are firmly anchored [Wide Application] These m3 threaded insert nuts can be inserted into various plastics, such as PC, PA, PLA, ABS, PETG, etc. Suitable for installing on 3D printers, electrical molding machines, electrical molding, automotive or laptop molding plastic shells, etc. Colour:gold Material:brass Package Contents: 1 x hot iron heating rod 5 x tips heat-set inserts (M2 M2.5 M3 M4 M5 M6) 360 x female knurled nuts (M2 M2.5 M3 M4 M5 M6) 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.