Gasket, Nose Case Vent, PN 1410541, Set of 2
On both M14P and Huosai the nose ( gear reduction) case has an angled vent.
This is its flange gasket.
Shipped in protective packaging to prevent bending.
Your gasket may be made from either Original Russian part in grey material but more likely laser cut Palmetto Supersheat 2970 Aramid/NBR material ( green)