Heavy Duty Polished Aluminum Battery Box Cover. Upgrade your Peterbilt battery box with this durable polished aluminum battery box cover. Designed with OE dimensions for direct replacement, it can fit up to 4 group 31 style batteries. This battery box comes with stem-up clamps and replaces OE numbers N22-6020-220. High Quality Battery Box Cover. Made Of Polished Aluminum. Designed With OE Dimensions For Direct Replacement. Protects Battery From Debris And Moisture. Assures Longer Battery Service. Services Up To 4 Group 31 Style Batteries. High Quality Aftermarket Replacement Part (Not OEM). Replaces OE Numbers N22-6020-220 And N226020220. Fits Peterbilt 330 1995 thru 2005. Fits Peterbilt 335 2005 thru 2010. Fits Peterbilt 337 2011 thru Current. Fits Peterbilt 348 2011 thru Current. Fits Peterbilt 384 2007 thru 2016. Fits Peterbilt 386 2006 thru 2016. Fits Peterbilt 387 1999 thru 2011. Fits Peterbilt 567 2014 thru Current. Fits Peterbilt 579 2013 thru Current.