Height of center (horizontal): 64mm, 2.52"Height: 3.74"Height (vertical): 4.13"Size of horizontal base: 5" x 3.96"Parallelism: 0.020mm, 0.0008"Squareness: 0.020mm, 0.0008"We have other models such as type A, type B and type D. The 5C collet block and 5C collet lathe chuck are available.