RubberShox DuraTPE & DuraTPE Pro Series - Front-Rear automotive coil spring buffer/booster kit is a shock absorbent accessory package that provides a tighter, more resilient suspension. - This absorbs and dissipates the shock from rough road conditions with greater driving stability while extending the life of coil springs and the suspension system. - Universal Fitment Type: A / A+ / B / B+ / C / D / E / F   Package List: 2 * Premium Shock Absorber Spring Buffers   Note:Please allow 1-3 cm error allowance due to manual measurement. We appreciate your kind understanding.  What is the difference between DuraTPE CSB series and the DuraTPE Pro CSBPro series?   DuraTPE Pro uses high-density TPE material that removes the body hole to increase compression and flexibility. The hardness rating 65 is higher than the standard DuraTPE series rated hardness at 60. DuraTPE Pro, due to stronger material, it roughly raises ground clearance 1”-1.25” per buffer set installed) compared to the DuraTPE raises ground clearance roughly 0.5” ~0.75”.   How does this product make my car feel "stiffer" while driving after they are installed?   DuraTPE / DuraTPE Pro series with industry-standard hardness 60, is designed to add firmer and stiffer support to the older shock suspension. It also increases the ground clearance for the vehicle to preventing low ground clearance vehicles from hitting road bumps.   When do I choose DuraTPE Pro over DuraTPE ?   Choose DuraTPE Pro series if you are installing onto a heavier SUV or truck and prefer a higher ground clearance and a stiffer ride. Choose DuraTPE for your sedan if you prefer a softer ride and less ground clearance. 【Product Dimensions】：Choose Size A+ of the rubber buffer, if the Car Coil Spring Gap (when lifted and unloaded) is between 2.6”-3.5”. *Please lift the vehicle to measure the Gap. Coil gap may vary between brands and years of use. Also refer to Size Chart in Photos and User Manual in Technical Specification. 【Supported Weight & Package Contents】：Our coil spring spacer is designed for sub-compact to mid-size sedans- 2000-4500Lbs GW. The lift height of a vehicle may vary from 0.2" to 1.5" depending on its weight and modification. Up to 2” if combined with Rubber Block Boosters. Rubber spacer with full ring design, reinforces car buffer/front shocks/rear shocks and shock absorbers (2pc. Per pack – multiple size options). 【Durable Material & Performance Enhancement 】： DuraTPE Thermoplastic Rubber - Environmental friendly and Resistant to coil abrasion, oil, salt, gravel & UV radiation. Enhances driving stability while extending the life of coil springs and the suspension system. Please check the template below to choose the correct buffer size. 【US Based Company】: Patent pending US design and support. In stock with lifetime technical assistance. 【Peace of Mind】：Enhanced stability, diminish the noise and vibration remarkably from suspension component. Prevents coil sagging with a reinforced suspension. This absorbs and dissipates the shock from rough road conditions while extending the life cycle of coil springs and the suspension system, save the maintenance cost.