M931 Ductile Iron Round Manhole Cover F900 Category: Manhole Covers > Airport and Ports Weight 160 ± 10 kg Load Class F900 Locking System Manual Lock
M901 Ductile Iron Round Manhole Cover F900 Category: Manhole Covers > Airport and Ports Weight 81 ± 3 kg Load Class F900 Locking System Automatic Lock