Silver 4.0mm Cassette spacer Sunlite 4.0 Allows the use of 7sp cassette on 8sp hub

We are 100% Organic Tree Huggers. Our inspiration comes variously from the book "Ismael" by Daniel Quinn teaching that we are a part not the center of life on the planet. Also, Chief Seattle and Leonardo da Vinci's concept that Everything Is Connected and of course, Carl Sagans' observation of our small planet earth as the Pale Blue Dot.