Block Sizes

40mm x 40mm x 100mm length x 18mm clearance hole (19mm)  Weight 1kg

40mm x 40mm x 100mm length x 20mm clearance hole (21mm)  Weight 1kg

50mm x 50mm x 110mm length x 22mm clearance hole (23mm)  Weight 1.8kg

50mm x 50mm x 125mm length x 24mm clearance hole (26mm)  Weight 2kg

50mm x 50mm x 125mm length x 27mm clearance hole (28mm)  Weight 2kg

60mm x 60mm x 175mm length x 30mm clearance hole (31mm)  Weight 4kg

60mm x 60mm x 200mm length x 33mm clearance hole (34mm)  Weight 4.2kg

70mm x 70mm x 200mm length x 36mm clearance hole (37mm)  Weight 6kg

80mm x 80mm x 200mm length x 39mm clearance hole (40mm)  Weight 8kg