20-110MPa Concrete Rebound Hammer 60-90MPa Concrete Rebound Hammer Measuring range 20-110MPa 60-90MPa Standard energy 4.5J 5.5J Sping working length 106±0.5mm 100±0.5mm Spring stiffness 900±40N/m 1100±50N/m Steel anvil ratio fixed value 88±2 83±1 Product information Technical Details Part Number HT-225 Item Weight 1.95 pounds Package Dimensions 13.9 x 8.3 x 4 inches Material Stainless Steel Item Package Quantity 1 Batteries Included? No Batteries Required? No Additional Information ASIN B06XN58JYV Customer Reviews 5.0 out of 5 stars 7 ratings 5.0 out of 5 stars Best Sellers Rank #437,503 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #1,056 in Multi Testers Shipping Weight 4.36 pounds Date First Available February 28, 2017 Warranty & Support Product Warranty: For warranty information about this product,
