Spacers are used to add or overcome a small size difference in your truss construction. Spacers can also be used to pre-tension larger truss spans. T0 be used with CCS6-605 Safety R-spring x = 5mm to 50mm in steps of 5mm Available Sizes : 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50m ]