DBI SALA SEALED BLOCK 50 FT SRL W/RETERIVAL AND BRACKET3M DBI SALA Sealed Blok Self Retracting Lifeline, 3400923C, retrieval bracket, 50 ft (15 m) Galv Cable The 3M DBI SALA Sealed Blok Self Retracting Lifeline (SRL) incorporates a patented concept that helps separate components, such as the motor spring and brake, from foreign elements such as grease, moisture, and dirt. The 3M DBI SALA Sealed Blok Self Retracting Lifeline is IP 69K rated to protect against ingress of dust, high temperatures, and high