DF53-14P-0.6C DF53-14S-0.6H DF53-16P-0.6C DF53-16S-0.6H DF53-18P-0.6C DF53-18S-0.6H DF53-20P-0.6C DF53-20S-0.6H DF53-2P-0.6C DF53-2S-0.6H