The VForce4 membrane is the fourth generation of Moto Tassinari and now comes in a completely revised design. In contrast to the VForce3, the new version is again equipped with stops for the outer diaphragms.
Further innovations are:

Pre-bent diaphragm lugs for better sealing at the tip
Larger diaphragm cage for maximum flow
10,5% more surface area in the front area of the membrane
Wing profile in the area of the divider
Long stop surfaces to progressively retard the membrane lobes for improved durability of the membrane platelets
type RD350YPVS (RZ350, Banshee)
Suitable for: MRP, MMW, MRB/MBD, SRC intake manifold. For TS1 cylinders the diaphragm block also fits, laterally the holes for the screw connection of the intake manifold have to be made.

dimensions:

hole stitch: 58x48mm
8 flaps with stops