Specification:<br> Name:Toilet seat expansion rubber bolt<br> Material:Stainless steel+ NBR rubber<br> Color:Black<br> Screw diameter:5.6mm<br> expansion ball Diameter:Approx.17.4mm(unexpanded state)<br> length:Approx.40mm<br> Metal washer diameter:Approx.14mm <br> You will receive:<br> 4pcs toilet seat screws