New Sewing Machine Thread - Small Spools Dia Feather Polyester #50 Price is for 1 bobbin x 7 pieces. - Color: Black - Material: Polyester Approximately 45m per spool. ◎ We consider 90% of the bobbin to be the winding amount, but please understand that there may be variations exceeding 90%. Bobbin Size: Diameter - Approximately 20mm Height - Approximately 11.5mm Hole - Approximately 6.2mm Material - Transparent Plastic Please be aware that these bobbins are for small spools. Only for those who understand and agree to the above information.