For filling in bulk construction materials like sand, gravels, cement-concrete mix, soil, debris etc. our builder bulk bags are available in sizes ranging from 85 x 85 x 85 cm to 90 x 90 x 90 cm for 1000 kg and 90 x 90 x 110 cm for 1500 kg in single trip and multi trip options. Used repeatedly by renowned builder merchants, SafeFlex builder bags are designed for tough, durable and hassle-free performance, yet are inexpensive.