KIB Electronics SUBPCBM21 Tank Monitor System Circuit BoardKIB Electronics American Technology SUBPCBM21 Tank Monitor System Circuit Board; For KIB Enterprises M21NPVW M21VW M23VWL Model Monitor Panels For the last 35 years, KIB has provided our customers with products that are designed and engineered to high standards with a focus on customer satisfaction. Compatibility: KIB Enterpr M21NPVW M21VW M23VWL Model Monitor Panels