Custom 9" diameter pillar for maximum rigidity for your Meade, Celestron, EQ6, Paramount, Takahashi....made to required height. Base plate and top plate are 40cm square. Four holes in the corners of the base plate are approxiamtely 29cm apart ad the pillar comes provided with 4x stainless steel bolts for secure fixing to a concrete floor etc. Lead time average 3-4 weeks. Guideline price does not include delivery.