CHAIR SPACER is used for horizontal reinforcements such as suspended slabs, beams, etc. Good stability. The concave seat accommodates steel diameters of 6-40mm. The design of the JOLUKA CHAIR SPACER does not obstruct concrete-flow. It may be supplied in various colors, the most popular color being grey. The Chair Spacer is designed for strength and is therefore widely used for heavier steel reinforcing. Use approximately 2-4 Chair Spacers per square meter of area. * Bigger covers (60 – 100mm) are made with a wider base to suit soft supporting material or soft foundations, such as sand etc.