Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800148 Manifold Kit, Dual, 6 x 70mm (Standard Charcoal Tu Price on request 360-0190-01 Manual, Gilian 12 Price on request 201050 Filter, Replacement, GilAir-3/GilAir-5/BDX II Price on request