Shimano BR-MT620 4-Piston Brake Caliper Full-power stopping, non-series savings. The Shimano BR-MT620 is a four-piston hydraulic disc brake caliper that delivers the same consistent, high-power braking as the Deore M6220 caliper in a non-series package with a different cosmetic finish. The dual-diameter four-piston design offers strong stopping power and excellent modulation, while new low-viscosity oil, an updated piston seal, and a heat-resistant resin piston keep braking performance stable across a wide range of temperatures. Compatible with both standard and thicker 2. 2mm rotors, and works with non-finned metal or resin pads. Caliper only, no lever included. Features Dual-diameter four-piston design uses differently sized pistons to prevent rotor wobble, reduce noise, and deliver high stopping power with excellent modulation Temperature stability comes from a combination of new low-viscosity oil, an updated piston seal, and a heat-resistant resin piston for consistent feel across varying conditions Two-piece caliper construction provides a rigid, durable body built to handle demanding trail use Broad pad and rotor compatibility works with non-finned metal or resin pads and supports both standard and thicker 2. 2mm rotors Non-series option shares the same technology and features as the Deore M6220 caliper with a different cosmetic finish SPECIFICATIONSModel BR-MT620Brake Type Hydraulic disc Piston Count4-piston (dual-diameter)Construction Two-piece Fluid Type Shimano low-viscosity mineral oil Pad Compatibility Non-finned metal or resin pads Rotor Compatibility Standard and 2. 2mm rotors Lever Included No Intended Use Trail, MTB | Shimano | Br-Mt620 4-Piston Brake Caliper Caliper Only, With D03S-Rx Resin Pads