For 4" HingeThickness: 1/16"Material: PlasticColor: GrayQuantity: 15For Use On Doors And Jambs That Have A Gap On One End And Tight On The OtherFor Use With Interior Or Exterior Door, Residential Or CommercialEach Group Contains 3 Shims That Can Be Seperated Or Used Together For Triple Thickness Easy To Use, No Need To Remove Door From Jamb