4 Pack Set of Alesis Nitro Surge Turbo Forge DM7X DM6 DM5 Snare and Tom Set.  Drum Pads are 8" Diameter.  1/4" TRS Inputs.  They come with the drum and rack mounts that fit on the Nitro kit.  1 1/8" Diameter rack.  Can be used on any E-Drum kits with the same size inputs and rack size.  These are in great working and physical condition.