Fi-Shock IT5XY-FS Snap-On Extender Insulator, 5" The Fi-Shock Yellow Snap-On 5 in Extender T-Post Insulator fits securely on standard (1.25 or 1.33) studded T-posts. It is fabricated as one molded piece, so it needs no hardware. These yellow electric fence insulators are packed 25 per bag. Features Fits securely on standard (1.25 or 1.33) studded T-post One molded piece - needs no hardware Color: Yellow Packed 25 per bag USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.