Stens 530-018 Diaphragm Replaces Briggs & Stratton: 270026, 272538, 272538S, 272637, 4157, 4168, 5021 Fits Models Briggs & Stratton 91200, 92220,133200, 135200 and 136200 Made in the U.S.A This is a replacement part Part Number 530-018 This is an aftermarket of generic part