Olympus 290 Series Biopsy Valve This biopsy valve is a compatible replacement part for Olympus 290 series flexible endoscopes (GIF-290 CF-290). It seals the biopsy channel to prevent fluid leakage while allowing easy passage of biopsy instruments. Key Features Self-sealing design for a secure fit Medical-grade silicone construction Easy to install and replace Direct-fit replacement, no modification required Specifications Compatible Model GIF-290 CF-290 Material Medical