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Continue to ChatShock - 450mm, 10mm Spring, Adjustable, Hisun, Rear, 400cc - SHK3040 - PBC3197F1 - https://giovanni-bikes.com/express-parts-catalog/shocks-suspension/shock-450mm-10mm-spring-adjustable-hisun-rear-400cc-shk3040-pbc3197f1