Lightweight concrete blocks - Celcon Hi Ten/Super Strength 8.7N/mm2 +

50 high strength, lightweight concrete blocks Compressive strength 8.7N/mm2 These are surplus to requirements from extension build Collection only 1 each (original cost 2.20 each), so 50 for the lot See website for details: http://www.hhcelcon.co.uk/by-product/celcon-blocks-celcon-high-strength-grade-blocks