Campden Tablets 50

Amazon

For preserving and sterilising. Add 1 crushed Campden tablet to each gallon of wine at the end of fermentation to prevent oxidation and bacterial contamination during the bottling and syphoning, also aids stability.

The Home Brew Shop

50 Campden Tablets needed to make all wines, this helps the yeast to stop growing, use along side Potassium Sorbate to stabilise the wine