5col Survival Supply Skog Bands are made in the USA from EPDM rubber. EPDM is resistant to heat and cold, moisture, steam, and UV light. In addition to heavy duty rubber bands, EPDM is used as a roofing material, so you know it's durable. This is the Big Mix! It includes 5 Small, 5 Medium, 5 Large, 5 Extra Large, 5 Extra Extra Large, and 2 Jumbo Heavy Duty Rubber Bands. Features:EPDM rubber is much stronger and less stretchy than regular rubber bands.Heavy Duty Rubber Bands easily secure everything from your ferro rod to a lobster claw to extension cords to the sling on your AR, and can be used to silence clanking gear like cooking utensils or dogtags.Can be used as an emergency tinder product; each Rubber Band burns hot and bright for at least a minute.Made in the USA.Sizes: Small: 0.875 in. flattened length x 0.5 in. width x 0.040 in. wall thicknessMedium: 1.5 in. flattened length x 0.5 in. width x 0.040 in. wall thicknessLarge: 2.5 in. flattened length x 0.5 in. width x 0.062 in. wall thicknessXL: 3.5 in. flattened length x 0.75 in. width x 0.062 in. wall thicknessXXL: 4.5 in. flattened length x 1 in. width x 0.062 in. wall thicknessJumbo: 6.5 in. flattened length x 1.5 in. width x 0.062 wall thickness