These insulators are used when a very secure placement of the insulator is required. They screw onto T posts for a very solid fit.Features Insulator slides down the T post Screw fitting to desired tightness Very strong and secure positioning Attachment Position - Front Attachment Method - Screw on compression Insulator Conductor Type - Polyrope Polywire Wire Insulator Material - High Density Polyethylene Color - White Dimension - 16 x 8 x 5 in. Item Weight - 1 lbs. - SKU: FMSP026