This kit is all you need to add a BC lampholder to a Ceramic vase. The hole in the top of the vase must be between 10mm and 15mm and you will need to get a tool inside from the bottom to hold the nut when you tighten the assembly up. This kit allows you to extend the lampholder 1.5” from the top but by leaving the spacer out you can mount the lampholder directly on the top of the vase or ceramic pot. Ceramic vase in the picture is not included.