It is Based on Collector's Backpack on Gamefront...
It's a plugin that expands the size of player inventory to 16x16, NPC vendor to 16x16, stash to 16x16, cube to 16x16 and player trade to 16x7...
Smaller inventory items meant for upcoming Zy-El, credit to Kato and his legacy....
sounds nice, will try when i get to replaying D2 .
THX