The Heavy Duty Multi-Post Wide Jaw Pinlock Insulator is one of our most popular insulators simply for it s durability and flexibility. Multi-Post Insulators are a snap on plastic insulator designed for t-posts but can be nailed to wooden posts or screwed to vinyl posts. Brand Name: Gallagher Product Type: Pinlock Wide Jaw Insulator Color: Black Height: 1.6 in. Width: 2.5 in. Depth: 2 in. Material: Plastic