For the following products:

iDR-4          
iDR-IN         
iDR-OUT        
iDR-SWITCH     
iDR D-IN       
iDR D-OUT      

PL-9

Rack Ears, to allow mounting in a standard 19" rack, are supplied with the product, but if you need to order more here are the part codes:

part no.       description 
AA4593-L     Rack Ear LEFT
AA4593-R     Rack Ear RIGHT

AB0074       SCREW M3X8 CSK TORX BK.    4 NEEDED/2 PER EAR