[VAT included for Europe region][Price for other region, please check currency at top right corner] [Custom declare matter, please inbox our customer service]   *Stainless steel bolt version only, Titanium bolt version upgraded to BB2-SLR 2 x 21mm-piston-design for strong braking power Brake mount: flatmount FM size is 34mm Oil: Mineral oil or DOT High-precision CNC machining from 7075 T6 Aluminum technology BB2-Stainless Steel Bolt weight: 96.4g Increase the thickness of the inner wall of the caliper, higher strength, adapt to high-intensity environment Larger piston floating clearance for better compatibility with other brake levers, reducing compatibility issues due to caliper replacement.   Some review from Pinkbike:https://www.pinkbike.com/news/review-lewis-lht-ultimate-brakes.html