The iOptron Leveling MiniPier is designed to work with either the HAZ31 or the HAZ46 mount.  It adds an extra 6.7" between the 8061A carbon fiber tripod (sold separately) and the 31 or 45 Strain Wave Alt-Az mount to allow for longer refractors to be used without hitting the tripod.  It is also nice to have that extra height and the leveling ability!  

• Mounting plate diameter: 102 mm (4")
• Pier height: 170mm (6.7")
• 3/8"-16 threaded mounting post on top plate
• 3/8"-16 threaded hole on base
• Needs 3x M8 threaded holes distributed on a 114mm diameter circle