Unfinished replacement arms come standard in Ash hard wood. Ash is as hard as red oak and is used in the manufacturing of baseball bats and axe handles. Oak upgrade also available.  All arms are available in any of our four signature finish colors.  For oak arms an additonal $36 will be added to your order. Our arm pegs measure 1.5" by 2", stronger than the standard 1.5" square peg. The length of the square portion of the arm that fits into the dummy body is 12”.  All our arms are backed with our 90 day replacement warranty. Custom orders accepted at an additional charge. Please call 866-515-6555 to place your custom order.  NO RETURNS ON DUMMY ACCESSORIES.