CRL Aluminum Drain Block for B5S Base Shoe - 10/Pk Gate Posts It comes with a 3/8"-16

It comes with a 3/8"-16 x 2" (51 mm) Allen Stud for mounting to steel

view the Stainless Steel Disclaimer found in the Technical References section below

Stanchions

Polished Stainless Finishes

or 1-1/16" (13

CRL Aluminum Drain Block for B5S Base Shoe - 10/Pk Gate Posts It comes with a 3/8"-16Placed Under Base Shoe to Provide Drainage Space Great for Balconies and Decks Clear Anodized Finish Four Sizes to Fit All CRL Base Shoe Series Work with B5A, B5S, B5T, B5L, B6S Base Shoes Place CRL Aluminum Drain Blocks under exterior installed Base Shoe to provide drainage space for water run off. This is especially important where the Base Shoe will be installed on balconies or decks where water could dam up unless proper drainage is available. One