Ortlieb Ultimate Internal-divider

"The Ultimate Internal-divider from Ortlieb brings order to your bike bag and ensures that you always have an overview of your equipment. The flexible and lightweight inner divider is specially designed for the Ultimate handlebar bags and divides them into three clear segments. Whether you're on a short bike ride or a longer bike tour, this divider keeps everything within reach and neatly stowed away."
"Made from robust nylon, the Ultimate Internal-divider is not only durable, but also easy to handle. It is available in two sizes: size M fits perfectly into the Ultimate Five and Ultimate Six models with a volume of 6.5 to 7 liters. For the slightly larger Ultimate Six with a volume of 8.5 liters, size L is recommended. This makes your bike bag the ideal companion for every bike tour and ensures an organized interior, whether for everyday use or on extended bike tours."