Bicycle Hydraulic Disc Piston Compressor Tool Wear-Resistant Bike Hydraulic Disc Caliper Piston Insert Tool Plastic for Brake Caliper Adjustment. Features: Precision Reset Functionality, Safe Material Design, Efficient Operation, Sturdy Materials, Convenient Storage. Specification: Origin: Mainland China, Main Material: Plastic, Color: Blue, Size: About 10.6cm (4.17in)*3cm (1.18in)*1.62cm (0.64in), Net Weight: About 26g.