SPRING; INTERNAL DIAMETER: 13.5 MM; OUTER DIAMETER: 18.5 MM; SECTION/ THICKNESS: 2.5 MM; LENGTH: 130 MM; COMPONENT: ROUND SECTION; TYPE: COMPRESSION; NUMBER OF COILS: 20; MATERIAL STANDARD: SPRING STEEL ASTM A 227-47; SPRING CO 2.5 DIM D13030 CLASS C