This is a 55mm CHONK SENIOR. 
This Exclusive Chonky has a liquid core eyeball that spins when rolled!

Forged in infernal flame and bound by ancient contracts, Eye of the Infernal Pact is a fiery red 55mm d20 that holds a soul-gazing eye at its core. With crackling ember swirls and metallic silver numbers, it pulses with cursed energy. Best suited for warlocks, villains, or dramatic table reveals, this is a statement piece for those who like their dice to whisper back.

Each order is for only a single 55mm d20.
A  great addition for intermediate-level dice collectors!
DiceMice's polyhedral dice sets are compatible with Dungeons & Dragons, Pathfinder, Call of Cthulhu and many other tabletop RPGs.