Technic Engine Piston Round

This part in yellow exhibits color variation in sets produced after 2010. Although the parts are officially identified as yellow, actual colors have been described as bright light orange and other shades between that color and yellow.

This part in red also exhibits color variation. Although the parts are officially identified as red, actual colors have been described as rust and other shades between that color and red.

For the above two colors, sellers may want to add notes to their listings about what shades of yellow or red are being sold. Likewise, buyers may want to inquire sellers as to what shades of yellow or red are actually being sold before purchasing.