This D-Shape soft close toilet seat comes with a top bottom fixing system. This fixing system is sometimes the only option when access for fitting is a problematic. The seat is in a white plastic. There are two types of toilet seat fixings: Bottom Fixings and Top Fixings. Top fixing toilets seats work by feeding two bolts into the pan which are then tightened from the top. Top fixing assembly for ease of installation - Particularly useful when access is unavailable to fix seat to pan ie enclosed btw pan or in a particular awkward place to fix using the conventional bolt-up-type from underneath. Bottom toilet seat fixings are fitted from the top and then tightened from underneath, often with wing nuts. Product Features -Fixings supplied -UV protection to prevent discolouration -Tidy up the look of your bathroom suite - Strong duroplastic, thermoformed white toilet seat - Soft close - Easy to remove with one button - Shiny hygenic finish - Stainless steel hinges - Top or bottom fix hinges - W: 373mm L: 466mm - Hinge Range: 53-195mm