New brothread Type L (SA155) Prewound Bobbin Thread 144pcs White — Plastic-Sided 60S/2 Polyester

New brothread 144pcs Type L SA155 prewound bobbin threads are white, plastic-sided, soft spun polyester bobbins designed for commercial and home embroidery machines that accept Type L (SA155) bobbins.

These prewound bobbins are assembled with 60S/2 (90WT) cottonized spun polyester for a soft feel, housed in clear plastic sides to resist machine oil and simplify organization. The pack includes 144 white bobbins sized to Type L (SA155) specifications, compatible with many popular embroidery brands; check your machine manual or the dimension image to confirm fit before buying. The clear casing makes it easy to sort and spot the thread, while the soft polyester is comfortable if garments touch the bobbin thread area.

Which machines accept Type L (SA155) prewound bobbin threads?

Type L (SA155) bobbins are used by many commercial and prosumer embroidery machines. Compatibility depends on the machine’s bobbin plate and shuttle type; popular compatible makes include Smartstitch, Ricoma, Happy, Tajima, Bai, ZSK and Melco, among others.

• Check your machine manual for "Type L" or "SA155" bobbin compatibility.
• Compare bobbin diameter and height to the diagram included in the product images.
• Works with many single-needle and multi-needle embroidery setups when Type L is specified.

How does the plastic-sided design help my machine and workflow?

Clear plastic sides prevent oil absorption and distortion, protecting thread integrity near lubricated machine parts. They also help you keep bobbins organized and visible at a glance, reducing thread change time and errors during production runs.

• Plastic sides resist machine oil and humidity better than paper.
• Transparent casing allows quick colour and stock checks.
• Uniform prewound tension helps maintain consistent stitch quality.

What are the thread properties and why choose this yarn?

These bobbins are filled with 60S/2 (90WT) cottonized spun polyester — a soft, skin-friendly filament that balances strength and hand-feel. The cottonized finish lowers shine and creates a soft touch ideal for garments or projects where comfort matters.

• 60S/2 (90WT) spun polyester for a soft, near-cotton feel.
• Durable polyester core offers colorfastness and stitch strength.
• White neutral colour suitable for many base fabrics and embroidery designs.

How should I use and store these prewound bobbins?

Use the prewound bobbins directly in machines that accept Type L (SA155) to save winding time and maintain consistent tension. Store them in a dry, cool place inside their clear cases to prevent dust, deformation, or exposure to direct sunlight that could weaken fibres over time.

• Install one prewound bobbin per bobbin case without re-winding.
• Keep in original or similar clear containers for organization and protection.
• Avoid extreme heat and prolonged sunlight to preserve thread strength.

Who is this for: New brothread 144pcs Type L SA155 prewound bobbin threads are aimed at professional embroiderers, small batch manufacturers, and hobbyists who use machines that accept Type L bobbins and want a ready-to-use, soft-feel white bobbin thread. If you need bulk prewound bobbins for high-volume production, consistent tension for multi-needle setups, or a comfortable, low-shine polyester alternative for finished garments, this pack is a practical choice. Always verify your machine’s bobbin type before purchasing to ensure proper fit and optimal performance.