SENIOROY 3x3 Stickerless Speed Cube Magic Puzzles Recyclable material, harmless to human and environment. Great corner cutting , Tension adjustable.It doesn't corner twist as often nor does it lock up. good control of the cube.Excellent stability Combines high performance designs with good value.The 6 plastic color puzzle never requires stickers , Crafted with original and eco-friendly ABS material, non-toxic, reliable and lightweight, harmless to human and environment