Overview Reviews Product Description The complete filter kit for heavy-duty GPRO Fuel transfer pumps. Protect your fueling system today from rust, dirt, and dust from contaminated fuel. GPI Catalog Product Videos Custom Field Product Reviews Write a Review Write a Review × GPI 1" NPT 40 GPM 30 Micron Filter Kit 133537-01 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *