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TiRacing via Amazon has 3-Count WSKFDTI Whirlpool Refrigerator Water Filter Replacements (WSK0010) for $32.99 – $3.30 when you clip the coupon on the product page – $16.50 when you apply promo code Z7ZE8N8P at checkout = $13.19. Shipping is free with Prime or on $35+ orders.