This is a set of 4 genuine 3M Bumpon series rubber feet. These are unused pieces cut from a new sheet. They are the larger type used in PC-9801 Vm2 and later models. Ideal for replacing old, degraded rubber feet that have undergone hydrolysis. Compatible with PC-9801 VF/Vm2 through BX/BA, and PC-9821 series (Ae/As/Ap/Af/As2/Ap2/As3/Ap3/An and V200M/V233M). Specifications: 3M Bumpon(TM) SJ series SJ-5023 (20.6 x 20.6 x 7.6 mm).