Foam cannons and similar accessories attach via standard quick‑connect fittings or directly to spray guns. Compatibility notes typically state they work with electric or gas pressure washers up to 4000 PSI.
Microfiber rollers are intended for non‑sensitive hard indoor floors—ceramic tile, terracotta, slate, travertine and granite. T‑Racer and surface‑cleaner attachments are aimed at large outdoor hard surfaces such as concrete driveways, patios, decks and sidewalks.
Sizes and weights vary by accessory. Small nozzle attachments list dimensions around 1.6" × 4.1" × 3.9" and lightweight items near 0.66 lb, while larger surface‑cleaner items show overall dimensions up to roughly 39.2" × 11.3" × 30.3" and weights up to about 4.2 lb.
Kärcher microfiber rollers are machine washable; product descriptions specify they can be machine washed up to 140°F (60°C).
Surface cleaners use a shroud and splash‑free skirt to minimize overspray. They also employ fixed‑height spinning nozzles or twin‑jet rotating arms that maintain a consistent nozzle distance and cover wider areas faster, reducing streaking and cleaning time.