Shop Counter Perspex Custom Sneeze Guards to Protect your Staff and Customers. Hygiene Shop Counter Screens Smithers hygiene screens are designed to help stop germs in commercial shops and stores at the payment till. The countertop sneeze guards come in three variations, freestanding with acrylic feet, freestanding with steel 'L' brackets or 'G' clamped to the edge of a counter. Both bracketed options are available in black only for now. A range of vintage colours options will be made available soon. The hygiene screens can be ordered with or without the standard hatch that measures H28 x W40 cm