Help to Identify Collets

[Gaffer]

My friend has these collets and wants to sell them but he cannot identify them. I hope one of you can help. Thanks for looking.

 

[woodchucker]

There's no way to tell with the rule that far away. No caliper?
A 3c measures
0.893 at the widest point
The angle is approx 0.517 long
The barrel is 0.650 The threads are 26 tpi.
Overall length is 2.738

understand the spec on collets is pretty loose, as some have found out when looking at 5c's.. so everything is approx.

 

[Gaffer]

There's no way to tell with the rule that far away. No caliper?
A 3c measures
0.893 at the widest point
The angle is approx 0.517 long
The barrel is 0.650 The threads are 26 tpi.
Overall length is 2.738

understand the spec on collets is pretty loose, as some have found out when looking at 5c's.. so everything is approx.

We were hoping the logo and shape would suffice. I'll see if he can take some measurements.

 

[woodchucker]

I'm betting its a 4c based on the 3 inch length.. I don't have good knowledge but I would look at the specs.