Core size: 525mm * 318mm * 50mm ( 20.7″ * 12.5″ * 2″ ), overall size 705mm * 395mm * 120mm ( 27.8″ * 15.6″ * 4.7″ ), inlet/outlet 32mm / 32mm ( 1.3″ 1.3″ ), 2 ROWS; Note: Please check the pictures and dimensions carefully before purchase;