I haven't weighed it but it works for me on my SkyWatcher Star Adventurer GTi mount.

Got this for my SWSA GTi. Arrived quickly and well packaged as you'd expect from FLO. Fits perfectly on the stock counterweight bar and it's nicely finished.

Item well wrapped, arrived earlier than expected

I added an iOptron 1.35Kg Counterweight for SkyTracker to a Rowan AZ100 3.75Kg SS counterweight used with a Sky-Watcher AZ-GTi in equatorial mode.The NEQ6 counterweight bar length required was reduced by x2.
The delivery time was 10 days earlier than expected - so pleased to start star tracking trials during periods of clear skies.

I was at the limit for balance with my setup couldn't quite extend bar and supplied counterweight enough. This Ioptron CW fits as it designed for the SW shaft and give that little bit of extra weight to address my issues.

Really happy with this purchase, bought for my HEQ5 to help balance my new Sky-Watcher 200P-DS, as suggested by FLO. Does the job great, small but of good quality and locks onto the bar perfectly. Thank you FLO!

Bought two of these for a Skywatcher HEQ5 Pro mount - they fit and are a good option when balancing lighter equipment. Good communication and arrived on time as advertised - thanks FLO!!

Excellent and well made as usual. For anyone that's going to buy a Coronado PST, that counterweight is with a perfect weight.

Well made, compact counterweight ideal for my purposes. Availability from manufacturer was limited but FLO as ever kept me right up to date. Thanks.