Top Gun Customz 3.5 Inch Rear Lift Block Set 99-18 Ford F-250, F-350 Super Duty & 00-05 Excursion 4x4 TGC 3925214 Our blocks are 3 wide, just like the spring and spring pad  ensuring full, even contact between block and spring for ultimate stability Fully gusseted and stronger than any cast block 100% Manufactured and shipped in the USA with American labor and American steel! Seamless Heavy Duty Construction Hand Crafted and Welded with 1/4" Thick Steel Plate Powder-coated black to prevent wear and rust, Limited lifetime warranty, Simple and fast bolt on installation, Detailed install instructions included