Rudget EcoTank ink holder. Holes are little bit bigger to make possible to hold new ink with protection bag on it. Model has engraved letters to determinate the color of bottle in same order as in my Epson L3251 printer.

Its great way to store it clean and organized.

I hope You enjoy it.

Holes dimensions are 39 mm. Probably other ink type bottles will fit this holder too. But You have to check it by yourself. All 4 holes has 39 mm diameter.