Monarch Plank Boulevard Collection Calvaire European Oak Shrunken knots, hand-scraped, hand-brushed, occasional saw marks. Experience natural beauty of European Oak sourced from responsibly managed forests in Europe and the U.S., with use of the most eco-friendly adhesives and finishes available. Calvaire European Oak of Boulevard collection features hand scraped texture and rustic grade with natural treatment of the wood. Dry-sawn 4 mm thick top layer. Calvaire comes with a lifetime structural warranty, a 25-yr residential finish warranty and a 3-yr light commercial warranty. Calvaire European Oak is also available by special order in herringbone pattern and in ultra-wide and ultra-long plank.