Moser Engineering  bolt in style axles in 31 spline. This is for axles only. Axles all get access hole drilled in the face unless specifed otherwise. 
 
List posi or spool manufacturer in notes. B / H Dimensions must be measured with bearing OFF the axle. 
 
Measure A Dimension with dial calipers to fit the brakes you intend to use. 
 
Make sure you are measuring the C from the outside of the flange face to tip. Do not measure from housing end to carrier. The axle stickout must be figured into the C Dimension form outside of face to tip as pictured using a square.
 
Contact us if you have questions.