3/8 lnch (9 mm) Size Only

Made of Polyoxymethylene (POM), also known as acetal, polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts that require high stiffness, low friction and excellent dimensional stability.

Hook Dimension 1 5/32″ x 3/8″ x 3/32″ (29 mm x 9 mm x 2 mm)
Ring Dimension 9/16″ x 9/16″ x 3/32″ (14 mm x 14 mm x 2 mm)