... lid 2. 4-side lock 3.Airtight,heat-resistant,hygienic,durable,space saving 4.Pass QS,PDA,SGS,LFGB Specification:1 ... .It has 100% sealing performance ,high heat -resistant and extremely durable2.The product applies to microwave oven,dishwasher,refrigerator cold chamber&freezing ... so on.2.Our company has grown into one of the manufacturers with most powerful production capacity of plastic preseve products ...