What is the fine-grained topic of the following text: The Sentry Water Barrier has been tested and accepted for all TL-1, TL-2, and TL-3 lightweight 1,807 lbs (820 kg) and heavyweight 4,409 lbs (2,000 kg) vehicle impacts at 45 mph (7-kph) and 62.5 mph (100 kph) impacts. Only return the topic.
Sentry Water Barrier Impact Test Results