Fermentation cap with size 3 hole (Ø 35 mm) - for 2 to 5 litre carboy, with airlock

Fermentation cap - Fermentation cap with hole, size 3 (inner Ø 35 mm)

This perforated cap is placed on the neck of a glass carboy to insert an airlock. It allows the CO2 produced during fermentation to escape while preventing air, dust, and insects from entering, which protects the must during transformation. An essential accessory for making homemade wine, cider, or fermented fruit juice.

Features

• Type: perforated fermentation cap, for airlock
• Inner diameter: 35 mm (size 3)
• Suitable for 2 to 5-liter glass carboys
• Packaging: 1 piece

How to choose the right size

Measure the inner diameter of your carboy's neck before ordering. Size 3 corresponds to a 35 mm neck and is suitable for 2 to 5-liter containers. For larger carboys, from 5 to 10 liters, choose size 4 (Ø 45 mm); for 10 to 15 liters, size 4A (Ø 50 mm). This version is perforated for an airlock; there is also a version without a hole (Mostkappe) for sealing before or after fermentation.