This Bump Stop Spacer Kit is used to prevent a 3-6 inch Suspension System from over compressing. If your suspension were to over compress you could negative arc your springs causing fatigue and premature sag, as well as bottom out your shocks causing them to leak and fail. These spacers and an inexpensive way to prevent a world of expensive problems.Additional Attributes:GTIN:00840103402192Material:SteelDrop Length:1.375Bump Stops Included:NoAAP_UDA_12:EAAAP_UDA_22:1AAP_UDA_4:55California Proposition 65:WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.Colors:BlackExtended Information:Emissions :Emissions Compliance ExemptLife Cycle Status:Available To OrderPackaging:Quantity of Each:1.0Package UOM:EADimension:6.0000 x 6.0000 x 3.0000 inchesWeight:4.0000 PGPDF:I33100_REVA