High-quality materials: Brake calipers include XTR disc brake linings, which are sensitive, quiet, and resistant to high temperatures. Enhanced disc brake base design, high strength and resistance to breakage.F160/R140: Fits 140mm discs when installed in the rear brake position, and fits 160mm discs when installed in the front brake position.F180/R160: Fit 160mm discs when installed in the rear brake position, and fit 180mm discs when installed in the front brake position.Adjust Tightness: Allows adjust the tightness, left and right width. Light alloy disc brake device, durable and useful.Exquisite workmanship, it is an perfect upgrade part for your bicycle.Strong Control: With strong braking force, smooth and stable control. Excellent heat dissipation effect. Easy to install on your bike.Broad compatibility: Applicable to most mountain bike and road bike mechanical disc brake systems.Colour:blackMaterial:Aluminum alloy +410 stainless steelSize:160mm Package Contents:1 x F160-R140 front brake1 x F180-R160 rear brake2 x 160mm disc brake pads4 x ScrewOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.