The cables include a drum stop and loop and are suitable for use with single and double torsion spring door systems. Spring System: Torsion spring (single or double). We are an Authorized Distributor for Andersen, Larson, Marvin, Pella, GU Ferco, Hoppe, Emtek, Roto, Milgard, Peachtree, Weathershield, and many more.
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