PSA : If you're booking flights to COK, note that the aircraft deployed on this route is usually the ones with the Recliner J Class cabin, and you won't get lie flat seats. However, there are days when you get the angled lie-flat configured aircraft, been checking FR24. I like to call it the Saudi roulette. Unless you want to get stuck on a recliner at 2 in the morning on a 6-hour flight, try looking out for other destinations with a guaranteed better hard-product like MAA/BLR.

The recliner seats : https://samchui.com/wp-content/uploads/2016/03/4-1.jpg

Here's how you can identify if you have the old product:

HZ-AQA,B,C,...,H - Recliner Seats (Easy way to identify : the aircraft still has the old SAUDI ARABIAN livery), although I believe HZ-AQA has been repainted to the SAUDIA livery.
HZ-AQI,J,K,L - Angled lie flat seats (Decent but the seat controls hardly work :/ )
HZ-AQ11,12,13,...,30 - New SAUDIA lie flat seats on the A330-343 regional.