Bruce Natural Choice 2.25 in Gunstock Oak Smooth Traditional Solid Hardwood Flooring (40 sq ft) value:sq ft 25 in gauge for heavy traffic 25 in gauge for heavy traffic Exceeds ADA recommendations for slip resistance Highly resistant to soil and stains Ribbed inserts or grit strips available EnviroFlex product may contribute to one or more LEED credits Made in the USA Floorscore and certified sustainability May contribute to the LEED Green Building certification system Zip tip point eliminates the need to predrilled and provides easy starts into wood providing some unique advantages compared to the 3 4 in thick product Unlike most traditional 3 4 in solid Hardwood floors Feet) 40 Appropriate Level for Installation At or above ground level Variable Width No Variable Length Yes Subfloor Type Plywood or concrete Warranty 25 year Finish Type Prefinished Janka Hardness Rating 1290 Hardness Scale 3 (Janka rating 1261 1400) Hardwood Plank Width Strip (up to 2