DOUBLELIN prewound bobbins Size L — 144 pcs, 75D/2 polyester black, ~116 m each

DOUBLELIN LCB-75D2 prewound Size L bobbins are a pack of 144 black, cardboard-sided bobbins wound with 75D/2 commercial embroidery thread for front-loading machines that accept Size L.

If you run commercial embroidery projects or use an embroidery-only bobbin thread, these prewound bobbins are designed to save time and deliver consistent, smooth performance. They come prewound with approximately 127 yards of 75D/2 filament polyester (about #120 / ~60WT) on each Size L cardboard-sided spool, optimised for machines requiring Size L (also labelled Style L, SA155, or Size 9.4) bobbins.

Will these bobbins fit my sewing or embroidery machine?

They fit machines that explicitly call for Size L bobbins (sometimes shown as Style L, SA155, or Size 9.4). Size L has a 27/32 inch diameter and a 23/64 inch height; Size A, L, and M are not interchangeable.

• Check your machine manual for Size L, SA155, or 9.4 references.
• Measure an existing bobbin: 27/32" diameter, 23/64" height.
• These are for front-loading cases compatible with thin cardboard-sided bobbins.

How much thread does each bobbin hold and what is the thread spec?

Each bobbin contains roughly 127 yards of 75D/2 filament polyester thread. The thread corresponds to #120 (about 60WT), tex 17, denier 150 — a smooth, fine embroidery filament suitable for bobbin use in commercial embroidery.

• Approx. 127 yards (per bobbin).
• 75D/2 filament polyester = #120 / ~60WT, tex 17, denier 150.
• Black colour prewound for consistent tension and colour matching on the underside.

What projects or tasks are these bobbins best suited for?

These bobbins are made for commercial embroidery—threaded undercaps and design backing rather than seam-stitching. Because the filament is smooth and fine, it's optimised for embroidery density and stitch quality, not for sewing or quilting seams that require stronger, heavier thread.

• Commercial embroidery machines and production runs.
• Undercount/underlay stitching and satin stitch backing.
• Not recommended for structural seams, heavy-duty sewing, or quilting.

How should I confirm compatibility before ordering?

Always verify your machine's bobbin specification before purchasing. If your machine uses Size A or Size M bobbins, choose the corresponding DOUBLELIN size instead of L.

• Consult your machine manual or manufacturer website for bobbin size guidance.
• Measure an existing bobbin or compare with the stated dimensions (27/32" diameter, 23/64" height).
• Look for front-loading Size L cases that accept cardboard-sided bobbins.

Who is this for: This 144-pack of DOUBLELIN LCB-75D2 Size L prewound bobbins is aimed at embroidery professionals, small production shops, and hobbyists running machines that require Size L bobbins and prefer prewound supplies for fast changeovers. If you need bobbin thread for heavy seam work, or your machine uses Size A or M bobbins, pick the appropriate DOUBLELIN size instead.