Running low on bobbins? This bulk pack of 30 metal bobbins is a lifesaver for any serious sewer or quilter. These are industrial-style 'Size L' bobbins with a slot (class 15 type). They are compatible with a massive range of popular home sewing and quilting machines, including: Juki TL-2000Qi, TL-2010Q, TL-2200QVP, TL-98 series; Brother PR600II, PR650, PQ1500; Janome/New Home 1600P series; and many Pfaff, Riccar, Singer, Viking, and industrial Consew models (see the full list in the description). The part number is 55623S (also crosses to many other OEM numbers). Having a big pack means you can wind multiple bobbins with your most-used thread colors all at once, saving you so much time during big projects. No more stopping in the middle of quilting or sewing to re-wind a bobbin! They're made from durable metal for reliable, smooth feeding. Check your machine's manual to confirm it uses this style of bobbin before ordering. This is one of those simple supplies that makes your sewing life infinitely easier. Stock up now!