The item is not available on the STEAM marketplace.
Resident Evil: Revelations Resistance Set
Resident Evil: Revelations Resistance Set DLC
The custom parts contained are there to help you take out special types of creatures. There are 6 weapons and 28 parts in all. Parts include Giant Rabbit's Foot 3, Green Belt 3, Poisonous Lure 3, Hunting Gear 3, Dehumanizer 3, and more.