This is a wrought and welded roller with suspension eye, to take pot, rake or net line. The roller is made of solid plastic, probably ABS, pivoted on a 12mm A2 bolt, and the frame is of 5 x 75mm stainles bar with an eye welded on top:
a very solid construction.
The roller is 100mm long by 45mm diameter, turned from a solid block.
This would cost at least £50 to duplicate, I am asking £30 for it.
Buyer collects or I could post it for £2.80 at current rates.