SIZE & PACKAGE: Sticky dots diameter: 0.78 inch/20 mm. Includes 300 pcs clear hook and 300 pcs white loop . (Total 600 sets) Exquisite packaging, safe and clean products. MARITAL & FEATURE: Velcro dots with adhesive are made of high quality nylon and fabric, used with one pair to attach: Hook and Loop. These self adhesive dots has the characteristic of strong adhesive, long lasting and anti-adhesion. They can adapt well in wet environment. STRONG ADHESIVE& WATERPROOF: These velcro dots are made of high quality nylon fabric and hot melt adhesive with high temperature resistant. Strong adhesive and long lasting, anti-adhesion characteristics, can adapt well in wet environment. EASY TO USE: Back material is plastic film, easy to peel off the Self Adhesive Dot from the paper roll when you need their work, saving your time. Reusable, premium, and environmental friendly. TIPS: Please put hook dots and loop dots separately, do not mix them together, otherwise it will be difficult for you to separate them. Clean and dry surface before application. Adhesive reaches maximum strength after 24 hours. If you have any problems, you can contact with us at any time. Self Adhesive Dots 600 PCS (300 Pairs) 0.78"/20 mm Diameter Sticky Back Magic Sticky Dots Waterproof Hook & Loop Dots with Adhesive for Art Craft Classroom Office Home Deco White