: Advantages: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Allows you to repair or renew a toilet seat for a back to wall pan, without having to remove the pan from the existing plumbing system. Eliminating the need for a plumber 4.Not only for back to wall pan but pans with fixings that are hard to get to or hard to see.5.Instead of buying a costly top fix toilet seat that come supplied with the seat,simply purchase a cheaper one and use these finxings instead. Saving you money.6.Simply push the rubber gromit through the hole in your pan. Place the seat on top and use the bolt supplied with our kit instead of your normal fixings.7.As you tighten the bolt up, the brass insert at the bottom rises expanding the rubber ball creating a tight fitting. Therefore eliminating the need to tighten any bolts underneath. (Top Fix) 8.Please check if these are compatible with your new or existing toilet seat before buying. There should be one bolt for the fixing straight through the pan. You may need to use part of your existing fixings with this new kit. Specification:Color:BlackMaterial:Rubber+metal+PlasticSize: 4.5 x 2.8cm/1.77 x 1.1 inch(L x W)Weight:77g Package include:4 x Toilet Hinge screws