Shimano GRX BL-RX600-L + BR-RX400-F Hydraulic Disc - Flat Mount - Set FW
SHIMANO GRX BL-RX600L/BR-RX400R 1700mm Left Rear JKIT/Lever Caliper Hose Oil Fill Set JKIT Oil Filled Hose Connected to Caliper Side - Discovery Japan Mall
Amazon.com : Shimano GRX BL-RX600 Left Drop-Bar Hydraulic Brake Lever without hose or caliper : Sports & Outdoors