O-RING-BASE-12pk
Ultralight O-RING-BASE-12pk ball O-ringsfor the AD-1420 and AD-3816 ball adapters. The O-RING-BASE-12pk is a pack of 12 replacement rubber O-rings. They are used on the bottom of many Ultralight base adapters such as the AD-6MM, AD8MM, AD-1420 and AD3816 adapters. The base O-rings are Buna, Size 113N70