Comparison : Item # 15H/CF/LF-15L, DB metic (Dunham-Bush) Compressor
Item # 15C/ELF, DB metic (Dunham-Bush) Compressor
Item # 20C/ELF, DB metic (Dunham-Bush) Compressor
Item # 20HF-20H/CF/LF, DB metic (Dunham-Bush) Compressor
Item # 20L, DB metic (Dunham-Bush) Compressor