The B7 and B7D Schelle Carbon Fiber Bulkhead Shim Set contains 3 pcs... 1 x 1.5mm and 2 x 1.0mm thickness... so racers can run 1, 1.5, and 2mm bulkhead height.
2 x 1.0mm carbon fiber
1 x 1.5mm carbon fiber (noted with extra hole)
Slotted design, pull tab... won't compress or flex like molded plastic.