Stiffening ring made of deep drawn sheet metal inside
Materials for sleeves: NBR and FPM (FKM), but other materials such as ACM, EPDM, HNBR, VMQ (MVQ) also possible, all-rubber coating (inside and outside) also available.

Type	Profil	Description	Application	Standard / Description:
VK-1		cap fully jacketed	For sealing bores on shaft outlets and inlets and gearboxes. Paintable rubber coating.
VK-2		Cap partially jacketed	See type VK, but tighter fit.