3 PCS Powerful Rubber Band Bungee Replacement For Hunting Sling Shot For King Slingshot s0159 s0161 Inside diameter:1.7mm/0.0669 inch Outside diameter:4.5mm/0.1771 inch Length:44cm/17.3 inch Type:Four-stripe band This mode rubber band use 4.5mm clips steel balls, when you buy it, please make sure your slingshot can use this mode rubber band, or you can buy the professional slingshot from our store.