Standard 8mm dyneema slings. Rated to 22kN.
The 60cm version is the over shoulder length and the 120cm is the twice over shoulder length.
Once upon a time slings were measured in feet and the length referred to the amount of tape needed to make them. Now however we measure them in centimetres and refer to the end to end length.
Therefore:
4ft sling = 60cm sling
8ft sling = 120cm sling
Please note, colours may vary.