Product Description
As per Newport Website:
The MPH-2 Miniature Post Holder uses a spring-loaded thumbscrew for constant force. It includes a double bore to provide full two-line contact along the 0.313 inch diameter miniature optical post. Once the thumbscrew is tightened, the post and post holder become nearly one piece, providing very high stability. Cross-bored to allow vertical or horizontal post mounting. 2 inch height.