Permi pole/post and rail fences are durable, non-toxic and attractive fencing that will stand the test of time. Permi poles, in the past known as copper logs, are made without the copper chromium arsenate (CCA) that gave coppers logs such a bad name. Permi pole fences can be backed up with mesh or left open and is available as a single, double or tri-pole profile with domed or flat capped posts depending on the exact specifications you want.