Model CB39DD is a unique beaver trap. It is designed for beavers and otters as a swim through trap to be used under water or partially under water, but can also be used in shallow water or on land. These beaver traps perform best when set upside down in water. The powerful doors actually lift and push the animal into the trap. This Comstock Series Beaver trap weighs 23 lbs and measures 39L x 18W x 12H. This is a heavy duty professional trap with two trap doors. This trap is triggered by a swing bar wire trigger mechanism which allows you to capture the most trap shy animals and does not have a trip pan for animals to avoid.