This 8” long arm post steps down from Tiffen 3/4” (19mm) to PRO 5/8” (15mm) and allows the ZeeGee to be used with the Tiffen G series arms. Tiffen Arm Adapter Post for ZeeGeeSKU: RP-ZGTAP $30.00 Regular Price$25.50Sale PriceEnd Of Year SaleQuantityAdd to Cart