MONO-BALL WITH 2 VALVES Back Catalog number: 3911 Availability: In the manufacturer's stock Price on request - + Recommended 358 PETRI DISHES, ASEPTIC, O 90mm (1 pc) Price on request 1193 OVERTURNABLE STOPPERS, SYLICON RUBBER, o 15mm Price on request 366 PETRI DISHES, STERILE, O 90mm (1 pc) Price on request