PROCRAFT 6U 12" Deep Rack Case in Black Carpet Wrap - Side Handle w/ Rack Screws Small Aluminum Blank 19E You can use the abbreviations

You can use the abbreviations that are located next to your connector options for the "D" mounts

(2 PACK) PENN ELCOM G08 round speaker grill with mounting hardware

Cut Out:  8-5/8" x 6-3/8"

(2 Pack) PROCRAFT LY-409 Panel Mount USB 3

Box measures 14-1/8" x 6-1/4" x 4" deep and is made from 18 gauge steel

PROCRAFT 6U 12" Deep Rack Case in Black Carpet Wrap - Side Handle w/ Rack Screws Small Aluminum Blank 19E You can use the abbreviationsPROCRAFT SRC 6U 12 SH is a 12" Deep Equipment Rack made with High Quality 3 4" plywood (light weight and very sturdy) and has Rabbet Joints that are Screwed and Glued for Years of Service. This rack is Covered with high quality Black Automotive Grade Carpet. * Please Note: THIS RACK DOES NOT INCLUDE FRONT OR REAR LIDS * This unit does include: 1) Procraft steel reinforced strap handle with T nuts and machine screws 8) PENN ELCOM Protective Nylon