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.

5/8″ Dimension 1 1/32″ x 3/4″ x 3/8″ (26 mm x 20 mm x 9 mm)
3/4″ Dimension 1 1/16″ x 1″ x 7/16″ (27 mm x 25 mm x 11 mm)
1″ Dimension 1 17/32″ x 1 1/4″ x 7/16″ (39 mm x 31 mm x 11 mm)
1 1/2″ Dimension 2 1/8″ x 1 3/4″ x 7/8″ (54 mm x 45 mm x 22 mm)
2″ Dimension 2 15/16″ x 2 7/16″ x 3/4″ (74 mm x 61 mm x 19 mm)