fireproof door lock for ship: 1 material: SS 2 certificate: CCS 3 suitable door thikness: 38-42mm fireproof door lock for ship:1. Certificate: ISO9001:2000, CCS2. Characteristis: fireproof, durable3. Specification:This lock is composed of double bolts, single cylinder, mechanical password button and master key mechanism. It is opened and closed by knob inside and the user can open the door with ...