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Crest [crestwhitesmile.com] has 2-Pack 20-Treatment Crest 3D Whitestrips Professional Effect Teeth Whitening Kit on sale for $ 45 ($ 22.50 each). Shipping is free
2-Pack of 20-Treatment Crest 3D Whitestrips Professional Effect Teeth Whitening Kit $45 (22.50 each) + Free Shipping