Avery Original Letter Tray Risers 118mm Steel Black Pack 4 - 404B-118

Avery steel plated risers give you extra space between your letter trays. What you need are steel plated connectors to give you extra space. If you add four of these longer length risers in-between each tray, it will give you a clearance of 118mm.

Price: 1.54 from Office Stationery