XF052-00
It can meet the fire requirements stated in SOLAS 1974 and amendments in 1978 and watertight test requirements 0.1 MPa.

LxBxR100 clear size	L1xB1xR212 external size	L2xB2xR214 opening size	cover thickness
1000x1000	1223x1223	1227x1227	16
1200x1200	1423x1423	1427x1427	16
1400x1400	1623x1623	1627x1627	16
1400x1600	1623x1823	1627x1827	16
1600x2000	1823x2223	1827x2227	16
1800x2500	2023x2723	2027x2727	16
2000x2500	2223x2723	2227x2727	16

Identification example:
Class A60 sunk type watertight hatch cover, clear size is 2000x2500mm, the thickness of cover is 16mm:
Class A60 sunk type watertight hatch cover A60 2000x2500x16 XF052-00