Kolbi Pipemarker Co. pipe markers, pipe, markers, valve markers, colby, kolbi, adhesive markers, pipeline, wrap around, marking, valve tags, pvc, valve chart, medical gas, arrow banding tape, banding tape,stencil, underground markers, medical gas markers, mechanical identification Kolbi Pipe Marker Co. is a leading manufacturer of identification for pipes, valves, and equipment. For over 50 years, Kolbi has provided the nation with quality products provided by a dedicated staff to ensure our customers get their products on time. We do not have part numbers, so ordering product is a breeze.