Quantity   Component name
2 × FT90R Continuous servo https://www.pololu.com/product/2817
4 × 150mm Zipties
6 × AA Battery
1 × 6 AA Battery holder https://smile.amazon.com/gp/product/B0768P78P1
2 × M2 12mm bolts
1 × Power switch https://www.mouser.com/ProductDetail/612-RD1113112R