Walmart continues to offer the Duck Brand Weatherstrip Seal for Extra-Large Gaps 3-Pack, model no. 281226, for $6.94. Opt for in-store pickup to dodge the $5.97 shipping charge. That's $1 off and tied with our mention from last month as the lowest total price we could find. Each self-adhesive foam strip measures 3/4" x 1/2" x 10'.