8" x 18" Power Trowel Combination Blade Blue with bar mount is 30% thicker and will last 15-25% longer with fewer blade changes. Made to precise specifications for extended life and best performance. The 8" x 18" Power Trowel Combination Blade Blue (4 Pack) fits 46"-48" Allen, Bartell, Stone, Stow, Whiteman, Wacker and other popular styles of power trowelers. Sold in pack of 4.