Our Mitchell Base Hi Hat is made of 6061 T6 Aircraft grade aluminum and is mounted on a 12" x 12" cheese plate that is 3/8" thick. There are plenty of 3/8" mounting holes, spaced at standard one inch intervals. The 3 post risers measure 4". Other lengths are available-Call. Weighs 6.75 pounds.
Note: This Modern Mitchell Base is larger than most other manufaturer's Mitchell plates so there may be some slack if using this hi hat with other manufacturer's plates.