The O-Ring Size Selection Chart is an easy-to-use, 3-page flip chart showing silhouettes of 239 different O-Ring Sizes.
1. Match the cross section of the O-Ring on the cross section bar chart located at the bottom of each page.
2. Once you determine the cross section of the O-Ring, flip to the page that illustrates the O-Rings for that cross section and simply place the O-Ring on the silhouette that matches the O-Ring. Then read the size directly from the chart.
This O-ring is a S70-040.