4-piece wiffle ball set is tons of fun for people or pets * Hollow with hole pattern - makes it easy to throw pitches that jump, move & curve * Great for batting practice or games - also pet retrieval toy, easy for dogs to pickup & carry * Tough 1.25mm-thick PVC holds up to bat swings and dog chewing * One each of Yellow, Orange, Green & Blue; 2-3/4" diameter, .7 oz weight