These 4" x 18" semi-rigid small tree/seedling tubes really work well. We've successfully established a full property line of trees, protecting the early seedlings from browsing animals. We had them installed for 2 years on our seedlings, they did a great job, and they have many more years of useful life remaining.
They're constructed of durable UV-inhibited polyethylene and polypropylene materials and estimated to last 5-8 years in full outdoor exposure, and in our PNW climate, I'd guess even longer. These are in very good condition, ready to be put back into use.
There are 125 tubes in total for $30 (this is way way below original cost + tax + shipping, but we hope someone else can make good use of them)
Feel free to ask any questions you may have via reply email. Thanks for looking.