Recycled Plastic Sleepers don't come much bigger than these. They weigh between 37 and 100 kilos and from 1m to 2.8 meter lengths. They do not move from where you put them. Never need maintenance as they do not rot even if constantly immersed in water. Ideal flood barriers and frequently used by water utilities, landscapers, playground designers and builders. Once installed they will never need replacing though they can be recycled as and when necessary.