Diamond Core Drilling Pipe, drill rod for Geological Diamond wireline Core drilling, compatible to BQ, NQ, HQ and PQ Diamond Core Drilling Pipe, drill rod for Geological Diamond wireline Core drilling, compatible to BQ, NQ, HQ and PQLength: 0.5m, 1.0m, 1.5m, 2.0m, 3.0m, 4.5m. Diamond Core Drilling Pipe