... -004C Plastic Body, KS-004D Small Aluminum alloy Body, * KS-004H Plastic Body with air blow adjust * KS-004B use with ... -004D use with power supply KS-007 (4.6KV), KS-004H use with power supply KS-007 (4.6KV). * Ion balance ... ≤ ± 50V KS-004B KS-004C KS-004D KS-004H KS-004 series ionizer air gun