These are 1/4" Nickel Plated Brass Dura-Collars.
FEATURES:
Nickel plated brass construction
YOU WILL RECEIVE:
Two collars Two 8-32x1/8" set screws
REQUIREMENTS:
Installation. 5/64" allen wrench
SPECIFICATIONS:
length: .250" diameter: 1/4" ID .487 OD tjt 040902 ir/kh &