300 pieces Steel & Aluminium Rivet Nuts Assortment in 6 popular sizes M3 - M10. Compatible with fittings of the proper thread size. Package Contents: 25x Steel Rivet Nut M3 25x Steel Rivet Nut M4 25x Steel Rivet Nut M5 25x Steel Rivet Nut M6 25x Steel Rivet Nut M8 25x Steel Rivet Nut M10 25x Aluminium Rivet Nut M3 25x Aluminium Rivet Nut M4 25x Aluminium Rivet Nut M5 25x Aluminium Rivet Nut M6 25x Aluminium Rivet Nut M8 25x Aluminium Rivet Nut M10