From the site you intend to mount the mirror, judge the distance in metres to the viewer and the area to be observed. Add the two distances, to give a combined distance. Use the following chart as a guide.
| Product Code | Description | Up to (Metres) |
| IP147746 |
Indoor Acrylic Mirror, 450mm |
10 |
| IP147748 |
Indoor Acrylic Mirror, 450mm |
13 |
| IP147747 |
Indoor Polycarbonate Mirror, 450mm |
10 |
| IP147749 |
Indoor Polycarbonate Mirror, 600mm |
13 |
| IP147750 |
Heavy Duty Outdoor Polycarbonate Mirror, 450mm |
10 |
| IP147751 |
Heavy Duty Outdoor Polycarbonate Mirror, 600mm |
13 |
| IP147752 |
Outdoor Polycarbonate Traffic Mirror, 600mm |
13 |
| IP147753 |
Outdoor Polycarbonate Traffic Mirror, 800mm |
15 |
| IP147754 |
Outdoor Polycarbonate Traffic Mirror, 550x830mm |
18 |
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