Concertina Coil Specification | |||||||
Coil Diameter | 300 mm | 450 mm | 730 mm | 730 mm | 980 mm | 980 mm | 1250 mm |
(12 inch) | (18 inch) | (28 inch) | (28 inch) | (36 inch) | (36 inch) | (50 inch) | |
Recommended Stretch Length | 4 m | 10 m | 15-20 m | 10-12 m | 10-15 m | 8 m | 8 m |
Coil Diameter When Stretched | 260 mm | 400 mm | 600 mm | 620 mm | 820 mm | 850 mm | 1150 mm |
Spiral Turns per Coil | 33 | 54/55 | 54/55 | 54/55 | 54/55 | 54/55 | 54/55 |
Clips per Spiral | 3 | 3 | 3 | 5 | 5 | 7 | 9 |