GR. 25 the ideal solution for deck-level swimming pools.
GR. 26 ideal for swimming pools with masonry headwalls.
GR. 32 this is the simplified version of GR.26
GR. 100 Nautilus, 33x33 cm large base, ideal for pontoons.
GR. 110 Nassau, small 24x24 cm base, suitable for small concrete walls.
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