This 100mm Petri dish is sterile, clear, and has a single vent. The Sterilin® Petri dish is manufactured under strict aseptic conditions within a Class J clean room which complies with BS 5295. The Petri dishes remain under clean room conditions throughout the manufacturing process. An in-house microbiology laboratory performs all the necessary testing, including that of sterility. The 100mm Petri dish conforms to BS 611 Part II, which involves stringent control of rigidity, thermal resistance, stackability, and dimensional consistency. The dimensional consistency of this dish makes it the first choice for use with automatic plate pourers. Sturdy polyethylene sleeves which exceed BS611 Part II are used to pack the Petri dishes. An inner liner compartmentalizes the carton and ensures that Petri dishes arrive in perfect condition. All cardboard used is of recycled grade. Size: 100mm. 20/Pack; 25 Packs/Case. Dynalon® #: 502014-02.