Jagwire Universal Bleed Blocks Replacement Small Parts Do you need more bleed blocks for your Jagwire Elite Bleed Kit? The Jagwire Universal Bleed Blocks are 3 replacement bleed blocks that are compatible with most 2-piston and 4-piston hydraulic disc brakes. Features3 replacement bleed blocks for Jagwire Elite Bleed Kits Compatible with most 2-piston and 4-piston hydraulic disc brakes Jagwire part number: WST063 | Jagwire | Universal Bleed Blocks Set Of 3