BACK SHELL KIT INCLUDES: (2) BACK SHELL HALVES (2) 440 THUMBSCREWS (2) HOUSING SCREWS (1) SET OF COMPRESSION INSERTS VARIOUS SIZES DIAMETERS 4mm 5mm 7mm (1) COMPRESSION SPRING Max. CABLE @ 013.00 0.465 BACK SHELL MATERIAL: DIE-CAST ZINC ALLOY NICKEL PLATING: JACK SCREWS: STEEL: Zn PLATED M3 HOOD SCREWS: STEEL: Zn PLATED COMPRESSION INSERT: ABS, UL RECOGNIZED COMPRESSION SPRING: ~ STEEL, NICKEL PLATED OPERATING TEMP: -40°C TO +120°C Tors COMPLIANT DIMENSIONS (thingummy) SIZE B.ox 31.20 2499 39.90 15.00 1.