6×19 Seale, 6×26 WS, 6×31 Filler, IWRC
Regular style standard hoisting line found on some older type overhead cranes models. 6x31 is used on small diameter hoisting ropes.
10 outer wires makes these ropes a little more flexible than 6x19 Seale, but remain less flexible than 6x36 ropes with 12 outer wires.
Figure this: 6x26 is groupled under the 6x19 Class, while 6x31 is grouped under the 6x37 Class athough both have 10 outer wires and can not be distinguished by their outside appearance.