俄罗斯采购需求：园林工具、汽车配件、仪器仪表、纺织机械、建筑材料、安全背心

We are looking to procure 28 air filters that meet specific criteria. The filters should comply with EN 779 class G4, with dimensions of 594x594x47 mm. They need to have a filtration area between 0.6 - 0.67 m², nominal flow rates ranging from 3200 to 3600 m³/hour, and an initial pressure drop not exceeding 65 Pa. The filters should come in a metal frame and be made from either fiberglass or polyester. We prefer well-known brands, but equivalents will be considered as long as they meet the outlined specifications. Please share your product availability and pricing details.