RR1.1  Single Wood Support   
Use in combination with RR3.1
Unlimited shelf thickness

Rod spacing: 
Shelf width + 35mm (1-3/8")

RR1.2 Single Wood Support   
Use in combination with RR3.2

Rod spacing: 
Shelf width + 35mm (1-3/8")

RR3.1 & RR3.2 Adaptive Support Ring                  
These rings are fasten to the shelf