State of the art rigid Sinuscope 2.7mm-4mm diameter ,different degrees 0˚-70˚ ,130mm/175mm length. Made of high quality stainless steel – to provide optimal durability and reliability. Soldered sapphire glass distal lenses – to ensure leakage and scratches free surface. Patented German optical system for high resolution, and crystal clear image & field of view. Autoclavable.