This addressable round LED pixel have 50pcs in a string
8cm 20AWG wire length between each LED,wire size:20A G
It used a silicon case make waterproof by inject A/B Epoxy
12mm diameter 35mm deep  from the top of the LED to the back of the rubber
DC5V power requirement only(do not exceed 6VDC or  short circuit) - no polarity protection
4Pin JST SM connector (non-waterproof) soldered in each end of string
The extra 2 single wire for powering in input side
(We also have other chip version:WS2811,LPD6803,SM16716)