Durable strong 20/25 litre bags for carrying heavy stuff (Coull AB34)

I have around 100 of these bags originally used for collecting/carrying/storing rock specimens - and growing trees/shrubs when filled with soil. Not one has ever torn in spite of being loaded with 20+kg of pebbles etc. Most of them are a bit dirty but only with sand, soil - and cobwebs! They can easily be washed with a hose. Still lots of life left in them; someone else can surely make use of them. Collect as many as you like from Tarland.