6.807.80in Pushrod Length Checker Steel Alloy 77021 Automotive Replacement Engine Push Rod Feature:1. Part Number: According to the original factory specifications, pushrod length checker replacing part number is 77021.2. Main Function: Save yourself a lot of guess work to properly figure out what pushrod size you need for your engine build.3. Easy Reading: Individual length checker adjustable range 6.800 to 7.800in. Easy to read and eliminate the need for expensive calipers.4. Durable Material: Pushrod length checker is crafted from a steel alloy with black oxide coating for years of accurate measurements.5. Ideal Solution: Having the correct pushrods in your engine is a factor in proper rocker arm geometry, and this is the best tool to measure pushrod length (it reads like a micrometer).Specification:Item Type: Pushrod Length CheckerMaterial: Steel AlloyColor: BlackReplaceable Part Number: 7702-1Measurable Size Range: Approx. 6.80-7.80in/17.27-19.81cmPackage List:1 xPushrod Length CheckerNote:1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks