Save money and hassle. They're hygienic too, as there's no need to fish around in plugholes. Just lift the whole strainer, and deposit yucky bits in the bin.
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Commercial Catering Sink Kitchen Utility Sink Single Bowl 201 Stainless Steel
Single Bowl 201 Stainless Steel Commercial Catering Sink Kitchen Utility Sink
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300mm BRASS BASIN BALL PLUG CHAIN 12" EASY FIT Bathroom/Bath/Kitchen/Metal/Sink