Buss Time Delay System Fuse. Used in Balboa spa controls such as our EP6551 and others.

• 300 Milliamp
• Time delay

Product notes: 1-1/4"L x 1/4"D. Replaces Balboa 21581. VS500, VS501, VS504, VS510, EP6500, EP6501, EP6510, EP0600. Keep a spare fuse on hand.