The middle groove design of the jack stand pad is a good protector, when the car is lifted by the jack, the jack stand pad can avoid bending of the frame rails and clamp welds, and can also protect the painted or coated suspension components to prevent the chassis rails from being scratched, bent or broken. It also provides more cushioning and crush resistance to protect painted or coated chassis components the package contains 2 types of jack pads for floor jack, including round and V groove shape, the round measures about 2.95 inches/75 mm in diameter and 1.38 inches/35 mm in height, the V groove shaped measures about 2.48 x 1.97 x 1.73 inches/63 x 50 x 44 mm, universal for different types of car body and jack Colour:Black Material:rubber Size: round diameter:about2.95 inches/75 mm,height:1.38inches/35mm V groove shaped:about2.48x1.97x1.73inches/63x50x44mm Package Contents: 8 x Jack stand pads(4 each of round and V groove shape) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.