Suitable for fire and smoke doors Material: Stainless steel 304 Without ball bearing & lubricant oil Packed with stailess steel wood screws Machine screws available on request for mental doors(MS) Ball bearing without BB Finish SSS
Suitable for fire and smoke doors, Material: Stainless steel 201/304/316, With ball bearing (2BB or 4BB) Packed with stailess steel wood screws Machine screws available on request for mental doors(MS) Ball bearing 2BB/4BB Finish SSS/AB/AC/Gold PVD/BL