Design Features: Commercial Grade Heavy Duty Plastic White Seat Gap fronted seat only anti-vandal seat. Virtually indestructible. Fitted with innovative StaTite hinges that ensures that once fitted the seat will not come loose New on market no hinge system like this Glass Filled propylene hinge body Glass filled nylon nut with integrated washers. Weight: 1.4kg Fitting Instructions: Perfect for heavy use, in schools and public toilets, or maybe in domestic bathroom suites if you've got heavy handed family members! StaTITE fixings - Nut breaks off here at precise tightnening torque, resulting in a seat that STays TITE! Suitable for hole centers 155mm Bottom Fitting - Not suitable for Wall Hung or Back to Wall Toilets Please check dimensions to see compatability with your toilet     Traditional bottom fix This toilet seat has a traditional style bottom fixing, which means you fit your bolts down into your pan from the top and then tighten them from underneath. Bottom fix seats are NOT suitable for use with wall hung or back to wall toilets.