Foam Pits Cubes/Blocks 500 pcs. (Blue) 4"x4"x4" (1536) Flame Retardant Pit Foam Blocks for Skateboard Parks, Gymnastics Companies, and Trampoline Arenas 500 Piece/Pieces 4"x4"x4" All Pit Cubes Are Made Of High Quality Fire Retardant Foam, With High Tensile and Tear Strength. Meets California Technical Bulletin 117 Standards. Our Foam Blocks Weigh 1.5 density 36 ILD Land in a Skateboard and Trampoline Pit, Jump, Play, and Tumble on the Resilient Pit Foam Blocks/Cubes or Gymnastics Foam, Excellent Energy Absorption and Cushion 500 Piece/Pieces 4"x4"x4" Polyurethane Foam Blocks/Cubes Give Your Gymnasts or Skateboard Athletes Proper Cushion for their Landings Foam Blocks/Cubes Offer a Variety of Applications and Uses, Including: Gymnastics Facilities and Gyms, Trampoline Parks, Motorcycle, BMX, FMX and Skateboard Foam Pits, Indoor Rock Climbing Trampoline Pits Children Playhouse Foam Blocks, Arts and Crafts