Bridge and Shelf 01-0170-612 43-70W x 22 1/4D x 4 1/2H in. 78 lbs. 01-0171-612 43-70W x 22 1/4D x 4 1/2H in. 78 lbs. 01-0190-612 43-70W x 22 1/4D x 4 1/2H in. 78 lbs. 01-0200-612 43W-70W x 22 1/4D x 4 1/4H in. 78 lbs. 01-0240-612 43W-70W x 22 1/4D x 4 1/4H in. 78 lbs. 01-0280-612 43W-70W x 22 1/4D x 4 1/4H in. 78 lbs. 01-0320-612 43W-70W x 22 1/4D x 4 1/4H in. 78 lbs. 01-0360-612 43-70W x 22 1/4D x 4 1/2H in. 78 lbs. 01-0380-612 43-70W x 22 1/4D x 4 1/2H in. 78 lbs. Pictured: 01-0171-697 Left Audio Media Unit 01-0171-612 Bridge and Shelf 01-0171-698 Right Media Unit