KB columnar borrow devices * gravity columnar borrow devices * columnar borrow devices Price US Wildco company KB columnar borrow devices KB columnar borrow devices can be used to deposit more than 100m deep water sampling. Head unit attached stainless steel rope, and with the top of the valve, the top valve hit by the hammer and release; valve remains open during the dredging process is decreased, the minimum degree of interference caused by flow fluctuations and sediment of. After borrow devices can tie into the sediment release the hammer with the top of the valve is closed. Hard sediment sampling, the choice of heavy sampler (medium 7kg, heavy 16kg). Sampling tube length is 508mm. Medium 7kg, heavy 16kg. Sampling tube length is 508mm.