TPI (Teeth per Inch) : 18

{"catalogEntry": { "catalogEntryIdentifier": { "uniqueID": "200337840", "externalIdentifier": { "partNumber": "1146719" } }, "description": [{ "fullImage": "/images/product/images/1146719_med.gif", "shortDescription": "Chicago Pneumatic Blades for Air Reciprocating Saw Item# 157510 — 5 Pk., 18-Tooth, Model# CA146719", "longDescription": "Replacement saw blades for Item# 157510, Air Reciprocating Saw. U.S.A." }], "offerPrice": "Only $23.99", "wasPrice": "", "salePrice": "", "productRating": "", "productNumRatings": "0", "shippingStatus": "In Stock" }, "catalogEntryURL": "http://www.northerntool.com/shop/tools/product_200337840_200337840" }