Please check the pictures and description carefully before bidding.
Pay attention:
Every model with 2 different carriage belts,this one we sale is 42" with Part Number C7770-60014, pls check asin B07DCRH6ZS on amzon to place order if you need the 24" belt with part number C7769-60182 .

Part Number: C7770-60014

Compatible Models:(42-inch)
Compatible with HP DesignJet 500 C7770B C7770BR
Compatible with HP DesignJet 500MONO C7770E C7770ER
Compatible with HP DesignJet 500PS C7770C C7770CR
Compatible with HP DesignJet 510 CH337A
Compatible with HP DesignJet 800 C7780B C77780BR
HP DesignJet 800PS C7780C C7780CR
Compatible with DesignJet Copier CC800PS Q1262A
Compatible with DesignJet 815 MFP Q1279A
Compatible with DesignJet 820

Package Includes: 1 x belt, 1 x pulley