24PL – Primary CO2 code example: 24PL/H2L1U3 Download pdf 24PLD – Primary Double CO2 code example: 24PLD/H2L1U3 Download pdf 24PLN – Primary N2 code example: 24PLN/H2L1U7 Download pdf 24SL – Secondary Single Body code example: 24SL/L3C1U8 – 24SL/L3C2U8S Download pdf