33891: Molded from fiberglass filled Black nylon with stainless steel pin. Very sturdy and extremely lightweight. 33901, 33911: 316 Stainless steel. 33951: Polished 304 Stamped stainless steel. Black nylon base plate. Note: Can be used without base. 34911, 34921: 304 stainless steel. Fast pin type butt hinges.
