3M Fire Barrier Putty Sleeve Kit, DT 100, round, 1 in (2.54 cm) The 3M Fire Barrier Putty Sleeve Kit DT 100 allows for both new and retrofit data and telecom cable firestop installationsIdeal for high traffic cable penetrationsIt features a 1 inch diameter by 12 inch length sleeve (25.4 mm x 304.8 mm). Product Information Brand 3M Part # 7000145572 Fire Rating 4 Hour Origin Country USA Product Type Fire Barriers Size 1 Inch Product InformationBlank sleeve (0% cable fill) accommodates future cable installationNo gasket requiredReady-to-install kit for a complete cable or blank firestop installationSuitable for installation in gypsum wallboard and concrete walls or floorsTested up to 4 hours for fire-rated through penetration systems in accordance with ASTM E 814 (UL 1479)Two-piece split/hinged design for easy retrofit installation on existing cablesSuggested ApplicationIdeal for existing through-penetration openings with cables, future cable installations (blank openings) or new construction through-penetration openings for power and communication cablesThe cable types can be a mixture of the following:100 prNo24 AWG copper conductor telephone cables1/C-750 kcmil copper conductor power cable7/C-No12 AWG copper conductor control cablesCoaxial cables3/C-No 2/0 AWG aluminum conductor SER cable with No1 AWG aluminum ground conductorNo23 AWG Category 6 data cables