compatible with any 2.5 or 3.5 inch ide,sata or sas hard drive and solid state disk supports computer cases with an available 5.25 inch drive bay (screw-on type); allow to mount 1x 3.5 - inch drive and 4 x 2.5 - inch drive separating rubber washer and screws provide excellent heat dispersion and shock absorption made of high-quality metal; quick and easy installation what is in the box: 1 x hdd mounting kit , 4 x rubber washer, 16 x mounting screw,