| http://www.w3.org/ns/prov#value | - The upper portion of each post support S telescopically removably receives one of the caps C. Each cap C is of generally cylindrical configuration and is coaxial with its post support S. Cap C is formed of a resilient material such as a synthetic rubber and includes a head 24 which is formed with a circumferential slot 26 that telescopically receives the upper portion 28 of the post support S. A n
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