Dental Orthodontic Elastic Ligature Ties Quantity: 1000pcs = 100pcs/bag*10 bags Color: Colorful,Mixed Forces:2.5oz extra light              3.5oz light               4.5oz medium                6.5oz heavy Sizes: 1/8"   3.16mm           3/16"  4.7mm              1/4"  6.35mm            5/16"  7.9mm   Features: Excellent for ortho patients Very good elastic bands and strong too Good quality and cheap rubber bands Elastics outperform all others by a wide margin. Can close your teeth gap without the cost of braces. To be used on adult teeth only.