Half rack consists of one rear rack and one front rack.

Dimensions:
Front Rack: Gap between holes: 4″ / Holes Diameter: 1.5″
Rear Rack: Gap between holes: 1″ / Holes Diameter: 3.5″

Specifications:

Front Rack:   

Minimum Height: 2.75″

Minimum Width: 5.5″ (1 hole)

Rear Rack: 

Minimum Height: 3″

Minimum Width: 5.5″ (1 hole)