IMPERIAL MODELS
VOH4102A4N0: Aluminium 18" manhole cover assembly.
VOH4102A4A0Z: VOH4102A4N0 comes with clamp band assembly and PVV104 (vapour vent).
VOH4102A4N0Z: VOH4102A4N0 comes with clamp band assembly and PVV blanking plate.
METRIC MODELS
VOH4116A8N0: Aluminium 18" manhole cover assembly (metric).
VOH4116A8A0Z: VOH4116A8N0 comes with clamp band assembly and PVV104 (vapour vent).
VOH4116A8N0Z: VOH4116A8N0 comes with clamp band assembly and PVV blanking plate.