A Core deposit is a form of deposit you pay until returning your old part. If you don't have the core at the time of purchase, you must pay the core charge. That charge is refunded to you when you return the core.
Peerless ReelTrac Reel Wire Rope
332"316" x 250' reel
The 7 x 7 construction, with seven strands of seven wires uses heavier gauge wire which offers more abrasion resistance than 7 x 19, but it is not as strong and is less flexible.