Loading... Please wait...Rigid polypropylene. Impervious to battery acids. Non-vented. Meets USCG Specifications No. 183.420 as an OEM installed battery hold-down system. Use with 24/24M series batteries. Black, with hold-down strap and mounting hardware. Wt.: 2 lbs. O.D.: 13"L x 9"W x 10-3/4"H. I.D.: 10-5/8"L x 7"W x 7-5/8"H.