Brand: Summit Racing Manufacturer's Part Number: SUM-PG1 Part Type: Plastigage Product Line: Summit Racing? Plastigage Summit Racing Part Number: SUM-PG1 UPC: 190861085336 Minimum Clearance (in.): 0.001 in. Maximum Clearance (in.): 0.003 in. Individual Piece Length (in.): 12 in. Quantity: Sold individually. Notes: Gauge measures metric ranges from .025-.076 mm. Summit Racing? Plastigage Made from a special extruded plastic thread with accurately controlled crush properties， Plastigage provides a fast and accurate way to check bearing clearances. Plastigage is packaged in a calibrated envelope that not only protects the plastic threads， but also serves as a scale to measure the bearing clearance. One package contains enough Plastigage to check both main and connecting rod clearance for one engine.