Quantity: 250Size: 3" Width X 4" LengthThickness: 1/4"Material: PlasticColor: BlackMaximum Bolt Width: 3/4"Lightweight Horseshoe Shaped Shims Are Designed To Fit Around Bolts And Anchors And Are Often Used For Aligning Windows Or Curtain WallDoes Not Expand Or Contract Due To Weather ChangeDurable Design That Is Vermin, Insect And Decay Resistant