Specifications

1 1" diameter steel post riser
2 Stackable
3 PRB with M6x1P (1/4-20W) clearance hole for most posts and post holders

PR4 & PRA4 Series
PR6 & PRA6 Series
PR4 & PR6 Series
PRA4 & PRA6 Series
both of hole are M40.7P(#8x32W)
both of hole are : M6x 1P(1/4x20W)
Material : Stainless Steel
Material : Aluminium (Black anodized)

 

 Features

1" diameter steel post riser
Stackable
PRB with M6x1P (1/4-20W) clearance hole for most posts and post holders
PR-B with M6x1P (metric) clearance hole for common usage also compatible for
Imperial version 1/4-20W.
PR6-series top and bottom with M6 tapped hole Imperial version is 1/4x20w.
Holding fork with two length for extensive application.