The Koro is the most innovative Boro tank (Type Boro Billetbox R4) on the market.
With its unique, innovative design, the Koro is the first tank that can be filled from all 3 sides, without having to remove it from your box.
Its multiple customization options and side-opening system will delight all Boro fans, whatever your AIO.
The Koro is an alternative tank to the Boro R4 from Billet Box Vapor. It features a slide on each side for fast, safe filling, whatever AIO Box you're using, as long as it allows side filling. And a glass window on the front for classic front filling.
"3 WAYS TO REFILL"
This PC clear or Black Delrin version, with a pair of black-anodized aluminum doors and a glass window on the front, is compatible with most AIO boxes on the market.