H4Bats Three Chamber Bat House Kit - BCI Certified - 28"x18"x4.5" - Easy to Assemble - Grooved Roosting Surfaces - Holds 200 to 300 bats Dimensions:H 28" x W 18" x D 4.5" (includes roof overhang) Roosting Space: 660 Cubic Inches Bat Capacity: about 200 to 300 bats (depending on species) Made from quality ACX material and precision machined BCI Certified and Manufactured in the USA at our Batshop!