[1.9 oz (55 g)] More mass but still light and nimble. Got these and the 250mm to position lighting accessories for extreme close up shots. They're stout with super snug threading that once assembled they'll stay put. I'll order more soon as there's uses I haven't thought of yet and fairly priced.

[3/8" (10 mm)] These things aren't too compllicated but they look nice and stand up to heavy use. They just straight up do the job.

[3/8"] 9 solutions gear is strong and easy to work with. Changing the way we think and making rigging stronger, quicker, and easier.

[3/8"] Wow these are skinny but really strong to get into tight spots with the Pico Clamp attached reflector or whatever. Threads are cut smooth to attach whatever with secure tenacity. I'll get more.

[3/8"] I used this in combination with a Pedco UltraMount Universal Ball Head, an Impact Small 3/8" Female Threaded Adapter to 1/4"-20 Male Threaded Post, a Vello Cold Shoe Mount with 1/4" thread, and a lock nut from a Rycote 037302 Hot Shoe Adaptor to attach a Rode Video Mike to my Manfrotto Fluid Drive Head. This freed up the camera hot shoe to hold another accessory, and moved the mike to a position where it was out of my way and less likely to pick up camera sounds. You would think that an item like this would be commercially available as a unit, but every "magic arm" I found was more complex, more expensive and still required some more hardware to complete the link. The setup works perfectly.

[1.9 oz (55 g)] It's a simple all metal design. I have it attached to an Atomos Sumo monitor/recorder and I really like it. When hung up on a C-stand the distance from the pole is very to the back of the screen is very short, which I like! So it's pretty much as small as it can be so it takes less space in a case.

[1.9 oz (55 g)] Just like the 150mm set they're super precise, solid, strong, and the best I've ever seen. The connectors don't have to be torqued super tight to grip securely as the machining is excellent. Snugged up, no jiggle or rattle they're like a solid longer piece. Go for it.

[1.9 oz (55 g)] This low profile mount lets me safely attach my monitor to a 5/8 baby stand. I can easily close the monitor case with it installed.

[3/8" (10 mm)] The depth in this 9.Solutions VESA mount is as minimal as it can get, and for that, I absolutely love it. Worth the money. The ones Ive been buying for the past decade have a 2 pin in the back that have to go into a receiver on the C-stand, which all pretty much adds up to the same overall cost. 

The benefit of this low-profile, minimal depth mount are: 
1) easy to pack any monitor with it in a flight case (easier mobility),
2) its inherently mounted on a stand at a perpendicular angle, and if thats not what I want, its easy to mount to the C-stand receiver tools that I would have been using anyway for the alternative mounts that I have (with the long pin in the back), then moveable in any direction of my choosing,
3) its sturdy and well-made, even, something few would likely notice, the provided M5 screws are high-end.

For most monitors, this is an easy screw on and done deal... but, there are some monitors with recessed VESA mounting screw areas which will need a couple of smartly sized washers to provide stability beyond the recessed space and might need longer non-high-end M5 screws that only cost a couple of bucks.

If I could trade in all my VESA mounts so that theyd all be this 9.Solutions VESA mount, I would do it in a heartbeat. Im that impressed, and have no hesitation in making this recommendation to others.