Replacement Base-Plate for Deardorff and most Large Format Cameras. Better than the original. This is not made from cast aluminum as were the original stock base-plate. These are made with 6061-T6 Aluminum and milled to specifications. Also, there is a threaded stainless steel insert to prevent cross-threading when mounting your camera to the tripod. Thread size available is 1/4″-20 or 3/8″-16. Base Plate is 6 Inches in diameter. If you require another dimension or want a custom base plate please call. Visit riestripod.com and see under accessories. EMAIL OR CALL US AND WE WILL GIVE YOU 20% OFF IF YOU MENTION THIS POST!