Sewtech 144pcs Size L (SA155) Prewound Bobbin Thread -White | 70D/2 (60 Weight), Cottonized Soft Feel Polyester Thread, Plastic Sided, For Commercial/Home Embroidery & Sewing Machines
- Description
Ready to stitch. Ready to produce.
144 Ready-to-Use Size L Prewound Bobbins
Skip the winding station and keep your embroidery moving. Sewtech Size L (SA155) bobbins arrive evenly prewound with white 70D/2 (60WT) polyester thread for smooth, dependable everyday stitching.
Less Setup. More Stitches.
A consistent bobbin supply matters when deadlines are tight and designs are stitch-heavy. Each bobbin is precision wound in tightly packed layers to support an even thread feed, helping you spend less time preparing bobbins and more time finishing garments, patches, caps, gifts, and production runs.
- 144-bobbin bulk box: Keep a production-friendly supply within reach and reduce interruptions between jobs.
- Consistent precision winding: Even, tightly packed layers support steady thread delivery and balanced tension during stitching.
- Soft-feel polyester: White 70D/2 (60WT) thread has a cottonized, soft hand suited to embroidery on garments and next-to-skin projects.
- Clear plastic sides: Plastic flanges resist distortion and do not absorb machine oil, while the transparent construction makes organization and identification easy.
- Everyday white: A versatile bobbin-thread color for light fabrics, clean backs, lettering, monograms, and general embroidery or sewing.
Size L / SA155 — Check Before You Order
These are Size L (Style L / SA155) bobbins. They are not Size A / Class 15 / SA156 bobbins. Bobbin requirements can vary by model—even within the same machine brand—so compare the dimensions below with your original bobbin and check your machine manual before purchasing.
Product Specifications
| Brand | Sewtech |
|---|---|
| Model / SKU | PB-W70-144L |
| Quantity | 144 prewound bobbins |
| Bobbin Size | Size L / Style L / SA155 |
| Approx. Dimensions | 20.5 mm diameter × 8.9 mm high (0.81 × 0.35 in) |
| Thread | Polyester, 70D/2, 60WT |
| Color | White |
| Bobbin Sides | Clear plastic |
| Primary Use | Machine embroidery and sewing |
Built for Compatible Commercial Workflows
Size L bobbins are widely used in multi-needle commercial embroidery workflows. These bobbins may fit compatible models from brands such as Brother, Ricoma, Happy, Tajima, BAI, ZSK, Melco, Barudan, and SWF, as well as selected home machines—but only when the specific model calls for Size L, Style L, or SA155.
A Full Box for Busy Embroidery Rooms
Open the box, load a compatible bobbin case, and get back to stitching. The 144-piece format is easy to store and gives shops, studios, schools, and serious hobbyists a dependable supply for repeat orders and long designs.
Clean Support Behind Every Design
The fine 60WT white bobbin thread is designed to stay discreet beneath top-thread embroidery while supporting detailed fills, satin stitches, lettering, and decorative motifs.
Frequently Asked Questions
Are these Size A / SA156 bobbins?
No. This listing is for the shorter Size L / SA155 format. Size A / Class 15 / SA156 bobbins are taller and are not interchangeable in every machine.
Will these fit my embroidery machine?
They are intended for machines that specify Size L, Style L, or SA155 bobbins. Verify your machine manual and compare the original bobbin dimensions before purchase.
What thread is wound on each bobbin?
Each bobbin is prewound with white 70D/2 (60WT) polyester bobbin thread with a cottonized, soft feel.
How many bobbins are included?
You will receive one box containing 144 prewound bobbins.
Why use prewound bobbins?
Prewound bobbins remove the manual winding step and provide consistent, tightly packed layers. This saves setup time and supports smoother thread delivery from one bobbin to the next.
Keep the Next Stitch Coming
Stock your embroidery station with 144 precision-wound Sewtech Size L bobbins and spend more time creating—not winding.
