Introducing the FMUSER Premium Bundle, the ultimate solution for your DIY audio studio and server rack needs. Our package includes 2 sets of 4U rack rails, 20 sets of M6 x 20mm rack mount screws, 20 sets of M6 cage nuts, and 10 sets of M3 x 5mm self-tapping rack rail installation screws. Designed with versatility in mind, these components are ideal for any DIY project, server rack, or studio rack. They're constructed from 2.5mm heavy-duty cold rolled steel with a durable black electro-static powder coated finish, promising longevity and lasting quality. Enjoy a hassle-free setup with our included M3 x 5mm self-tapping rack rail installation screws, and rest assured knowing our M6 x 20mm rack mount screws and cage nuts provide a secure, tight assembly. Choose FMUSER for all your DIY audio studio rack and server rack needs.