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Security Steel Door Standard

Nov 02, 2022

As we know, security steel door has 4 grands: grand A, grand B, grand C and grand D. The thickness of steel sheet of door leaf and door frame as: 1.0/2.0mm, 0.8/1.6mm, 0.7/1.4mm and 0.6/1.2mm.

Grand A is the high quality but Grand B and Grand C are the most customers choosing.

Zanfit door has more than 20 years’ experience in manufacturing security doors, and loved by customers, zanfit doors focus on make your home security and we did it.