Supler Flex Fillet Knife. We strive to provide new innovative products to meet the need of the rapidly changing world we live in. Our goal is to provide products made with the finest material and consistent and high quality processes.. Specifications Product Size: 6.75 in.; Blade Edge Type: Fine Edge; Blade Material: 5Cr15; Blade Shape: Filet; Handle Material: Injection Molded Nylon Fiber, Rubber Overmold; Sheath Material: Nylon Sheath; Total Length: 12.50″; .