Decal Stickers Caution Hazardous Noise Level. Ear Protection Required In This (4 X 2.16 In) Sticker size is 4 X 2,16 inches. 70 micron polymeric printed vinyl. Water Resistance: Vinyl self adhesive Fully water resistant and weather resistant. Decals are made of polymeric vinyl permanent adhesive and a 6-7 year outdoor rating. Can be applied wet or dry. Cannot be applied on walls or other porous surface. Our Stickers Stick to any clean smooth surface. Store Discounts for identical stickers:--&gt;1) more than 5 stickers -5% 2) more than 10 stickers -10% 3) more than 20 stickers -15%. 4) more than 30 stickers -20%. ||-&gt; Caution: The discount will not automatically calculate. It can be applied only after request. Send us a message and we will upload a brand new listing with the discount depending on the quantity you asked for.