The youngster safety are made of fine ABS material, BPA-free and have a mushy surface that isn't damage young people or scratch the door. The updated adhesive is awfully durable, but if your sliding door is simply too large, it's commended to use two locks together. The transparent and classy design will mix seamlessly with any home decor. Please confirm that the gap between the two doors or windows must be 0.28-1.38 inches earlier than purchasing.The sliding door stopper is definitely installed with stable adhesive, no drilling required and won't harm the wall or glass. Please wait 48 hours before using to ensure a safe hold. If needed, the lock can be removed via heating with a hair dryer. Specifications:Material: ABSColor: ClearSize: as photo showPackage Included:5 x Sliding Door Lock