- Smoke-free home - 1,000 piece count puzzle - Anti-glare surface - Ravensburger puzzles use an exclusively developed, extra-thick cardboard combined with our fine, linen structured paper to create a glare-free puzzle image and give you the best experience possible. - Precision fit – No matter how large or small our puzzles, each is precision made so that every piece fits perfectly. - Ravensburger product number 191451.