Translucent polyethylene cover with protective red cap that snaps on tightly. Fits squeeze bottle with threaded neck that measures 38 millimeters in diameter (about 1-5/16 inch)the common size of the neck of 8-, 12- and 24-ounce squeeze bottles. Does NOT fit wide-mouth squeeze bottles (like Wincos PSW-32).This natural LDPE Yorker spout cap has a .030 hole. Designed to help dispense the containers contents through the hole at the tip of its cone, the cap is great not just for condiments (mayonnaise, mustard, ketchup and other seasonings), but also glues, paints, and other materials for modeling and craft activities.