Double Space Saving Bowl Kitchen Sink WASTE KITS which come brand new in their original packaging. Kit comes with 2 x chrome waste 90mm basket strainers, the outside measurement of the chrome waste is 115 mm. These are universal kits so should fit most double bowl kitchen sinks The packs come with all of the components required for a waste kit with stainless steel strainers for a contemporary finish to your sink. Please see the graph for more detailed diameters.