Organ Silk Needle - HA x 1 GT.
Extra light ball point in small size 7. 
This is the smallest available needle size for domestic sewing machines. 
This needle is suitable for sewing velvet, satin, silk, swimwear and lingerie. 
Silk needles have an englarged eye in relation to the needle size, a wider groove in relation to the needle size and a tapered shank which helps prevent against puckering and skipped stitches.