10pcs atmega328 atmega328p-pu dip28 with pre-uno R3 bootloader

Atmega328P-PU Atmega328P Chip for Arduino UNO R3 Bootloader (Pack of 10)

TinkerBlock UNO R3 Starter Kit with 12 Plug-in Sensor Modules, ATmega328P, Ex...

Atmega328P-PU Atmega328P Chip for Arduino UNO R3 Bootloader (Pack of 5)

Nano V3.0 Micro Controller Module 10pcs ATmega328P CH340 Arduino Nano Compatible

UNO Learning Shield + UNO R3 Board with Arduino Pre-Assembled All-in-Starter ...

16 in 1 Home Modules Kit for Arduino Raspberry Pi DIY Professional

Smraza Starter Kit for Arduino UNO R3 Projects with Breadboard, Sensors, LCD,...