AME Cribbing Blocks are Certified and Tested • Available in Multiple Sizes and Shapes • Interlocking or Aggressive Non-Slip Surface • Non-Conducting Plastic Resists Oil and Most Chemicals • Does Not Splinter Like Wood • Made From 100% Recycled Plastic • Super Stacker Industrial Cribbing Blocks • Black • Size: 6" x 7" x 24" • Lanyard Colour Blue