They're a custom made substitute upgrade for replacing the Pioneer PL-520 factory feet
including the precision-milled aluminum outer shells
and Denon DP-755A turntable or 2550 Vinyl record turntable models
These new Pioneer PL-series rubber Insulators are made by Mnpctech with Neoprene Black rubber and will last many years
CaseLabs Custom PC Case & Pedestal Feet TECHNICS SL-151 MK2 Feet They're a custom made substituteSet of four Caselabs ATX and EATX Case Custom Replacement Machined Billet Aluminum PC Case Feet by MNPCTECH. 1 3 4" diameter (45mm) x 1 1 2" tall (32mm). Includes 10 32 thread screws and nuts. These custom feet replace the standard rubber case feet for the Caselabs S8, S8S, M8A, TH10A, SMA8, STH10, and SM8. Fits Caselabs Merlin SMA8, S8S and S8 Test Bench and the Merlin SM8, Mercury S8, Mercury S8S, CaseLabs Magnum M7A, CaseLabs STH10, CaseLabs TH10A,