AME International 30 Piece Cribbing Block Kit • (30) 15230 Cribbing Blocks — Size 6" x 7" x 24" • Certified and Tested • Non-Slip Surface • Non-Conducting Plastic Resists Oil and Most Chemicals • Does Not Splinter Like Wood • Made From 100% Recycled Plastic • Can Be Used With Lincoln Log Mating or Pyramid Mating • Made In America