The Fat Bead is a large diameter fiber-optic bead replacement sight. This sight features 6-48" threads.
Specifications:

Type	Fiber Optic Bead
Frame Material	Steel
Frame Color	Black
Firearm Fit	Ithaca, Remington, SKB, Weatherby Orion
Base Configuration	6-48
Style
Front Material	Fiber Optic
Rear Material	N/A
Front Color	Green
Rear Color	N/A
Rail Size
Windage Adjustment
Elevation Adjustment
Fiber Diameter	.100"
Firearm Type	Shotgun