M42 to 1.25" Self Centering Lock adapter

1.25" SCL Self-Centering-Lock - Self Centering Visual Back T-thread to 1.25" with M42 T2 Female Thread
It is practically a 1.25" eyepiece holder (also called visual back) that can be attached to (screwed onto) a male T-thread.

Specifications

• T2 female (M42x0.75) thread on the telescope side
• Self-Centering 1.25" eyepiece holder barrel on the eyepiece side with teflon compression ring
• Overall length: 33-35mm
• Black anodized base, blue anodised top
• Internal diameter: 31.9mm