Product features: · Set includes 10 ferrules for glue-on cue tips· Size: 13 mm· Made of high-quality ABS plastic· Durable and easy to use· OKKO Ferrules – the best value for the money. Product specifications: Material: ABS Plastic. Ferrule length: 25.6 mm (~1”). Ferrule outer diameter: 13 mm. Ferrule inner diameter: 8.4 mm. The price is for 10 ferrules