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Ryanfire TD Collar

Ryanfire TD Collars, also known as "drop-in" collars, are designed to maintain the fire resistance of fire rated floors where they are penetrated by various services.
The TD collars consist of a high quality stainless steel case lined with a highly reactive graphite infused material.
Upon exposure to heat the TD collar will quickly and effectively close any openings that may form due to the melting away of services.

Ryanfire TD Collar