I found these two that I could use to replace my old heavy duty plastic trolley.
http://ziplinegear.com/index.php?productID=339 http://ziplinegear.com/index.php?productID=364 Are these good ones to use for backyard zip lines? I want one that is reasonably priced, is stainless steel, will not slow down for a long time and is very rugged. My old trolley is very scuffed up on the nose of it and it seems jerky and slow.