H4Bats Two Chamber Bat House Kit - BCI Certified - 28"x18"x3.5" - Easy to Assemble - Grooved Roosting Surfaces - Holds 100 to 200 bats Dimensions:H 28" x W 18" x D 3.5" (includes roof overhang) Roosting Space: 440 Cubic Inches Bat Capacity: about 100 to 200 bats (depending on species) Made from quality ACX material and precision machined BCI Certified and Manufactured in the USA at our Batshop!