Fangrui Product Details [340pcs M2 M2.5 M3 M5 M6 Metric Knurled Nuts Assortment Set]: This Set Includes 340 Pieces Of M2, M2.5, M3, , M5, And M6 Threaded Insert Nuts. [heat Set Inserts For 3d Printing]: These Brass Heat Set Inserts Are For Securing Components In 3d Printed Parts And Can Be Used In A Variety Of Materials Such As Abs, Pla, Nylon, And More. [knurled Design]: The Knurled Design Ensures A Secure Fit While The Threaded Allows For Easy Installation. [easy Assembly]: These Nuts Are For Projects Requiring A Secure Fit And Easy Assembly. [versatile Set]: This Versatile Set Includes A Variety Of Sizes And Is For Any 3d Printing Enthusiast Or Professional. Metric Threaded Nuts (m2x2x3.2 M2x3x3.2 M2x4x3.2 M2x6x3.2)x26pcs (m2.5x2.5x3.5 M2.5x4x3.5 M2.5x6x3.5)x26pcs (m3x4x4.2 M3x6x4.2 M3x8x4.2 M3x10x4.2)x15pcs (m4x4x6 M4x6x6 M4x8x6 M4x10x6)x15pcs (m5x6x7 M5x8x7 M5x10x7)x6pcs (m6x6x8 M6x8x8 M6x10x8 M6x12x8)x5pcs Colour:photo Color Material:metal Package Contents: 340 X M2 M2.5 M3 M5 M6 Metric K