The Prothane spring and shackle bushing kit for 1986.5–1997 Nissan Hardbody 4WD includes red spring and shackle bushings specified for the listed Hardbody years and 4WD configuration. The description indicates these bushings service the leaf spring and shackle mount points; this overview presents the explicit vehicle fitment and the kit's red bushing finish as noted in the source.
Prothane 86.5-97 Nissan Hardbody 4wd Spring & Shackle Bushings - Red