This pillow block housing is made of two pressed steel pieces that snap together. Insert bearings with 52mm OD fit between the two flanges and are held together with nuts and bolts (not included).

Diminisions:
For bearings with an OD of: 52mm
Bolt hole to bolt hole: 3.385 in. (86mm)
Overall length: 4.252 in. (108mm)
Overall height: 2.228 in. (56.6mm)
Bolt hole: .452 in. (11.5mm)