Thick, flexible PVC hose and graduated plastic tubes. 150mm range of metric markings for level comparison and fall calculation. Ideal for use over long distances and around corners. Clip-on water caps prevent spillage. Ideal for low accuracy building, fencing and paving applications. Thick, flexible PVC hose and graduated plastic tubes. 150mm range of metric markings for level comparison and fall calculation. Ideal for use over long distances and around corners. Clip-on water caps prevent spillage. Ideal for low accuracy building, fencing and paving applications.