Friction Post 0.67 mm with 2 Inch Chain for Drop by PERRIN Sale $3.23 | / SKU 40-28-2008 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available Friction Post 0.67 mm with 2 Inch Chain for Drop are available in sterling silver. These posts measure 15mm x 0.67mm. Friction post are also referred to as straight posts.