Features: Cable rack insulators are designed to rest on cable rack hooks and provide a smooth, generous radius seat for the underground cable. The J5122 insulators accomodate J513_A series hooks. U604, U604C and U604AWD insulators are designed to engage onto U670 and U602/U603 series hooks. Material: Porcelain. 3" Long x 2-3/4" wide 1-9/16 Wide slot
VAULT CABLE RACK INSULATOR H-J5122