Prothane 70-81 Chevy Camaro Bump Stop Kit - Red Prothane 7-1302 CAMARO BUMP STOP KIT 70-81 PROTHANE has exclusive and innovative technologies that guarantee stability and high performance every time. Each of our products is specifically tailored to exact specifications of resiliency, performance and durability for the specific application. That is why the PROTHANE products are greatly superior. We manufacturer a wide range of urethane products as replacements and upgrades for OEM (factory) Rubber bushings, mounts, and parts. Urethane/Polyurethane is a term used to describe a family of elastomers (any compound exhibiting the characteristics of natural rubber; stretchy and elastic). Poly meaning "many" and "urethane" denotes the classification of the chemical structure. Polyurethane or Urethane for short is used as a solid cast material (bushings, mounts, mount inserts, etc.) that can be compounded as soft as a rubber band or as hard as a bowling ball. Each of our products is specially formed to exact specifications for resilience, performance, and durability for the specific application.