Fermentation cap without hole size 4A (Ø 50 mm) - for 10 to 15-litre carboy

Must cap - Solid cap, size 4A (inner Ø 50 mm)

This solid, non-vented cap is used to hermetically seal a large glass carboy: before fermentation, to protect the must from dust and insects, or after fermentation, for storing homemade wine, cider, or fruit juice once the process is complete. Also practical as a transport or storage plug.

Features

• Type: solid cap, non-vented
• Inner diameter: 50 mm (size 4A)
• Suitable for glass carboys from 10 to 15 liters
• Packaging: 1 piece

How to choose the right size

Measure the inner diameter of your carboy's neck before ordering. Size 4A corresponds to a 50 mm neck and is suitable for large containers of 10 to 15 liters. For smaller carboys, from 5 to 10 liters, choose size 4 (Ø 45 mm); for 2 to 5 liters, size 3 (Ø 35 mm). This version is non-vented; for the active fermentation phase with an airlock, opt for a perforated version (Gärkappe).