Attributes . RCH2 3 X 3 X 7 (NAB/SS), RCH2 3 X 3 (X 10) (NAB/SS), ZCH2 3 X 2-1/2 and 4 X 3 (NAB/SS/DUPLEX), ZCH2 1-1/2 X 1-1/2 (NAB/SS/DUPLEX), ZCH2 2 X 2 (NAB/SS/DUPLEX), ZCH2 4 X 3C (NAB/SS/DUPLEX), ZCH2 3 X 2 and 4 X 3L (NAB/SS/DUPLEX) . Names