UL listed Source Four fixtures are supplied with a safety cable, for which the ETC part number is 7060A1022.
This cable is a 30" long 1/8" diameter black wire rope cable with snap clamp fitted.
The safety ratio of the cable is 5:1
The breaking load of the cable is 2000lb.
The rated Safe Working Load (SWL) of the cable is 400lbs.
Manufacturers' certification of the cable is available for download here.