Heavy Duty Group 27 Battery TrayThis heavy-duty battery tray is made of non-corrosive black plastic. The tray includes an adjustable-height crossbar and stainless steel retaining bolts.Features:Meets ABYC Standard E-10 and U.S. Coast Guard requirementsInstall with #10 fastenersSpecifications:Inside Dimensions: 12″ L x 6-7/8″ WBattery Series: 27/27M Quick Guide (pdf)