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FyreCHOKE Hinged Retrofit Fire Collars are a premium collar designed to provide maximum protection against the spread of fire and smoke through walls and floors that are penetrated by plastic pipes or air-conditioning services. Using a hinge and integrated latch lock mechanism, the two halves of the collar simply fit around the pipe and fasten together. Extensively tested and approved to AS1530.4 and AS4072.1 in accordance with the National Construction Code of Australia.