The Surgical Kit 300 is filled with 3 surgical instruments, 2 numbing pills, and 3 different size bands. The surgical instruments are made with stainless steel for the blade and made with wood for the handle. The 3 bands are made from tight elastic and fabric. The Surgical Kit 300 is different for space because the surgical instruments can click into the kit. All the astronauts have to do is find their surgeon and get started.And when they're done they can just slip the band on where they got surgery.