Available with or without connections.

The hose fittings will allow connection of a garden hose for the water cooling part (see water pressure warning below) - standard male hoselock style connections in and out.

The fittings for wort are 3/8" barb for in and 3/8" push fit for out.

This is designed so that you can use silicon hose to supply wort to the chiller and then use some standard 3/8" beer line to deliver the cooled wort to your fermenter. If you prefer to use more silicon hose for this stage get another barbed fitting here.

From Kegland:

These copper counter flow chillers are probably one of the fastest ways to chill wort. They are similarly efficient as the 30 plate chillers however they are easier to clean as they do not have all the small crevasses to trap hop material and other
solids.
The copper is a very good conductor of heat. These units are 23cm in diameter and about 18cm high. The input and output are approximately 10mm outside diameter. These can be used with gravity but are recommended to use with a pump.
Upgrade your Brewzilla Chiller with a Counterflow chiller to rapidly chill your wort without the messy clean up!

PLEASE NOTE: these inexpensive counterflow chillers have a pliable polymer outer shroud. Because if this, they should not be exposed to restricted unregulated mains water pressures which can easily reach ~100psi when the flow is restricted. Warranty does not cover bursts/ruptures/blowouts of this outer layer resultant from having a kink in your output hose, restricting attachments on the output (such as sprinklers) or similar. Always ensure the output hose is free from any pressure buildup when using unregulated mains water. If you are looking for a more heavy duty, pressure resistant counterflow chiller, we urge you to consider the Coolossus Counterflow Chiller