These are reproduction Gromments for the WC-121,122,124 cabinets and a few of the sleeve cabinets. The original plastic was very thin and broke easily. The gromments has a two part job .one was to hold the heavy side panels into the receiver. The second was cosmetic. These have a little bit bigger lip. And can work with other 3rd party brands. These are not cheap .ABS plastic ,made in a 3D printer. I do not have the exact screws yet in black. They are Marantz 4.7 mm x 25mm zinc. I am subbing with the much better stainlessness steel screws. This is a rough estimate , but I have had black zinc machine screws come with some of the oringinal that are 23mm to 28 mm in length. Shipping is priority Mail , this includes the box and insurence at the stated price. any questions ,please email me at