Securely fasten your strap to any instrument with Ernie Ball rubber strap blocks. Fits most strap button types and provides a tight fit without any modification to your guitar. Made of flexible durable rubber that will slip over existing strap buttons for a secure connection. Available in... Red/Black Assorted 4603 Purple 5618 Blue 5619 Red 5620 Orange 5621 Green 5622 Pink 5623 Cream 5624 Gray 5625