This is a hard toilet seat with chrome hinges and is bound to get you a lot of comments from friends and relatives. Features: ChromaticDurableStain resistantEasy to cleanEasy to install Specifications: color:1,2,3,4,5,6,7, 8hinge:zinc alloy hingestransparency:not transparentsize:upward 43.5*36cm,downward 44*37. 5cmhinge distance:most 20cm,least 10cm(please carefully check if your toilet's hole distance falls into this range) weight:2.5kg 1.check the shapesuch as U,O,V,square shape2.measure the sizeafter checking the shape,the size is common.Toilet seat is U,V,O,square shape.U and V shape is suitable for most toilet seats.O shape is the old ones.Square shape is few,its shape is obviously bigger. New toilet seat is often aq little smaller than original one as only original one falls into the same size,slight deviance of size doesn't affact normal use. Long toilet seat's edge is like V shape,short one's is round like U shape and old one is ellipse like flat O shape. The toilet seat is not original one,it can't match 100%,size deviance in 3cm won't affect its installation,if you're perfectionistic with it please think twice before your order. Notice: 1.hole distance,standard one is 15mm,it will be difficult to install if it is less than 10mm2.pay attention to the distance from the hole to the water box,if it is too near the opening of toilet seat will be affacted. key word:toilet,toilet seat,resin,higes,zinc alloy