Thermaltake SPR-0850F-R Smart Pro RGB 850W 80+ Bronze Smart Zero 256-Color RGB Fan Fully Modular ATX 12V 2.4/EPS 12V 2.92 Power Supply 7 YR Warranty PS-SPR-0850FPCBUS-R Snap Spool. 100% Long Staple Matte Finish Mercerized Egyptian Cotton. For Machine Embroidery and Machine Quilting. Color changes every 2 1/2in to 5in.