Model 101SS is our Professional Series trap for squirrels, chipmunks, gophers, rats and similar size animals. This trap measures 18Lx5Wx5H. It features a very strong 1/2 x 1/2 - 16 gauge wire frame. The tight mesh pattern provides extra strength and prevents critters from reaching into the trap to steal bait and also prevents animals that are trapped from reaching out of the trap and damaging property.