These are official WRA approved whippet measuting wickets. The wickets are 4 gauge stainless steel. Price is $40.00 US dollars, including shipping, for a set of four wickets. These wickets measure whether a whippet is withing the US standard, or not. They do not mesure the actual height of the dog. Contact Gregg Gammie at Whippet@WhippetRacing.org>