Another quality product from 5 Star Chemicals in the US. This line cleaner is a blend of acids and detergents that penetrate and quickly remove oxalate and beer stone from beer lines and dispensing equipment.

DIRECTIONS:
Dissolve 60g packet in 10 litres of warm water.
Draw through the draught line and dispensing equipment until the solution flows.
Let stand for 10 minutes.
Flush system with warm water.

SDS information available here