Summary Supports to hold reinforcing mesh prior to concrete poor. This was only a small slab on a sloping base which required only 2 or 3 supports of each size (i.e. 75 mm 50 mm and 40 mm). To print two chairs was much cheaper than buying them as they sell the chair sizes in packs of 25 (way to many then required for a small project). They should have new category 'Building and construction' Instructions I have included STL files for the 75 mm support and the smaller 40 mm squat support. Just a simple procedure to print them of as rquired I have written an openscad file which is parametric, I shall tidy it up and post shortly.