Sealed with heat adhesives as the OEM requires; also these Oil Filters can use a Fevicol base. Also, the inner jelly of these Oil Filters are either welded or made from jink. These Oil Filters have heavy dust Holding Power and hence should not be changed until 5,000 km. Be it Oil Filters Jelly, or petrol tap as well as stunner oil pump filters, we use premium brass, nylon, pp mesh. We offer the Oil Filters in lose packing; if the clients want proper packaging then these filters can be offered in packs, having brand name – SMAIROME.