This shock absorber mounts between the axle and frame to control spring oscillation and keep tires tracking the road, fitting Mack, Volvo, and Navistar applications. It is a replacement sold individually. No additional physical specs are listed for this unit beyond its fitment across these makes.Interchanges:14QK3105M14QK3107M14QK3114M14QK431M2043342420513881209739938078195Mack 21436096Navistar MAS65130HSA-5084FeaturesSold Individually (EACH)Tech SpecsOEM Number: 14QK431MSell Pack: 1 EACHUPC: 193807228002