Granite black buckle - powder-coated textured for better wear resistance; The clasp has 2 set screws to give a more reliable hold; Constructed using stainless steel set screws; Buckle size 1 7/8" x 3; Nylon straps are made from a super-high density microfiber material that is an advanced composite of ultra-fine polyester fibers; The backing is sweat resistant; Strap thickness near 3/16" and fits up to 50" waist; Strap width is 1 1/2"