Tama s 1st chair drum throne provides unparalleled durability and comfort combined with maximum playability. The HT230 features a traditional round seat made using a strongly molded foam cushion that will hold its shape for years. The 1st chair height adjustment offers the best of both worlds - the precision of a threaded rod coupled with the quick adjustment of a T-bolt system. Traditional Rounded Seat The HT230 features a traditional round seat that is popular for its versatility. 1st Chair Height Adjustment (U.S. Pat. No. 5722627) 1st Chair thrones offer the best of both worlds-the exact height adjustment of threaded rod thrones with the fast adjustment of T-bolted systems: 1. Loosen the bolt and raise the threaded rod to the approximate desired height (it s not necessary to get the exact height at this point). 2. Screw the Height lock down to the top of the nylon bushing. 3. If a minor adjustment is necessary simply turn the height lock or rotate the seat. 4. Tighten the bolt firmly. Features: Round Seat Strongly Molded Foam Cushion Threaded Rod T-Bolt System Double Braced Height Adjustable from 18 - 26 8.8 lbs Get your Tama 1st Chair HT230 Round Drum Throne today at the guaranteed lowest price from Sam Ash with our 45-day return and 60-day price protection policy.