Brand: Sealed Power Manufacturer's Part Number: SPR-1 Part Type: Plastigage Product Line: Sealed Power Plastigage Summit Racing Part Number: SLP-SPR1 UPC: 724956681358 Minimum Clearance (in.): 0.002 in. Maximum Clearance (in.): 0.006 in. Individual Piece Length (in.): 12 in. Quantity: Sold individually. Notes: Red. Gauge measures metric ranges from .051-.152 mm. Sealed Power Plastigage Made from a special extruded plastic thread with accurately controlled crush properties， Sealed Power Plastigage provides a fast and accurate way to check bearing clearances. It 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.