The Karp DSB-123SD is a high-security access panel made of 10 gauge steel used in the detention industry. Locks shall be heavy duty detention lock.
Karp's medium security access door DSB-123SD-MS is a 12 gauge steel door used in areas where a more secure access panel is required.
Karp's KRP-150FR is a 3 hour rated insulated access door with exposed flange for ceilings.
The Karp KRP-250FR is an un-insulated 2 hour fire rated panel for walls with a n exposed 1 inch flange.