The first five product images show 130g thickened tube and the last three images are the 140g ultra thickened captive nut version.
Suits most entry-level scooter that require straight valve running the relatively low profile 8.5x2 50/75-6.1 (8.5") tyre on 6.1" rim such as Xiaomi M365 series including original M365, 1s, 2, 3, Pro, Pro 2 and Essential, e-Glide Swift, D150 & G60, Mearth S and for non-motor wheel the Dualtron Mini and possibly Inokim Super Light 2. Will not suit Xiaomi 4 Pro which adopts 10" 60/70-7.0.
Accompanies 8.5x2" tyres such as Wanda (original style tread) and CST "performance road".
On the M365 series, the straight valve suits front wheel (the wheel with motor housing). The rear (the wheel without motor) is typically 45 degree, however this straight can be used (as can most 0 degree and some 90 degree valves) as it is just a rim, no motor hub.
Available in choice of two weight classes: 130 grams and the ultra thickened 140g which incorporates captive nut and bevel washer to provides optional additional stem support on non-motor hubs.
e-watts (France) regards the weight of 145g tubes to be twice as thick as the original offering inner tube with thickness of 2.35mm, unlike standard "reinforced" inner tubes which have walls of 1.70mm. Original inner tubes are (or originally were) 1.35mm, they stock the original (common factory) tube which suggests the original CST branded ones may not be thick.
Fitting these is all about technique. Learn from the Pro's at e-Watts France: