Plastic fermenter ?? FerMonster Wide Mouth Plastic Carboy 27L

[Vallka]

Ok anyone use this? Can you tell me the size of the opening, they say 1.7" or 4.3cm. it looks bigger
FerMonster Wide Mouth Plastic Carboy 27L

 

[BOB357]

It's about 4". Be sure to get the ported one. A spigot makes for really easy sampling and transfers.

 

[Hawkbox]

I have 2 of them, my whole arm will fit in it, so 4-5" (10-13cm) wide? They're pretty slick.