Amazon has the 8-Pack of Gillette5 Men’s Razor Blade Refills for $14.54 - 5% off with Subscribe & Save (can cancel anytime) - $3 off coupon (check “Save an extra” box, eligible on first S&S order for this product) = $10.81 with free shipping on $25+ or with Prime. Fits Gillette5, SkinGuard, Fusion ProShield, Fusion ProGlide, and Fusion razors.