The Anycubic SP Kobra S1 / S1 Combo PEI Spring Steel Build Plate: is the removable, flexible magnetic build surface designed for the enclosed CoreXY architecture of the Kobra S1 series.It features a high-grade spring steel core coated on both sides with a textured Polyetherimide (PEI) layer, engineered to provide strong adhesion during printing and effortless part removal once cooled down.
Double-Sided Textured PEI Coating: Both sides feature a fine textured powder coating that leaves an attractive matte, textured finish on the bottom layer of 3D prints.
Flexible Spring Steel Core: Allows users to remove completed prints instantly simply by bending the sheet—parts snap off cleanly without needing scrapers or spatulas.
High Thermal & Magnetic Retention: Rated for continuous temperatures up to 110°C without warping or losing magnetic grip against the heated bed base.
Alignment Cutouts & Rear Handle Tabs: Includes precision alignment notches along the rear edge to drop perfectly into place over the bed alignment alignment pins, plus front/rear grab tabs for safe handling without touching hot surfaces.
Clean Surface with Isopropyl Alcohol (IPA): Regularly wipe down the PEI surface with 90%+ pure Isopropyl Alcohol and a lint-free microfiber cloth to remove skin oils, which are the #1 cause of first-layer adhesion loss.
Restore Adhesion with Dish Soap Wash: If filament stops sticking after heavy use, wash the plate under warm water using plain dish soap (like Dawn) and a soft sponge to remove stubborn residues, then dry thoroughly.
Avoid Metal Scrapers & Sharp Tools: Never use razor blades or sharp steel spatulas to gouge prints off the surface, as this will tear or scratch the PEI powder coating permanently.
Measurements
Item Weight: 300 g
Active Build Area: 250 x 250 mm
Total Outer Plate Dimensions: 264 x 276 mm (including extended rear tabs & handle)
Plate Thickness: 0.5 mm (spring steel + PEI coating