WSDS (WESTERN STATIC DISSIPATIVE SILICONE/SIEVES) Western has developed  food grade static dissipative  silicon rubber sieves  which we sell under brand name of WSDS (western static dissipative silicone /sieves) Advantages of WSDS Sieves :- 1) 100% food grade with US FDA AND ECC certificate 2) repeat sterilization possible 3) no fungus can deposit 4) bacteria free  5) available in gray colour  All sizes available