HDSP-4830 red bargraph display by Avago. 10 individually addressable red led's in a gray faced stackable block. Download Avago HDSP-4830 .pdf datasheet: Status: NOS (New Old Stock) in original tubes. pin 1 to 10 (all Left hand side) are Anodes 11 to 20 (all Right hand side) are Cathodes. RoHS compliant: YES