asy-Grip No-Slip Knob winter plug for 1-1/2" FPT. 800-9. Z-Grip Tapered soft rubber plugs for maximum expansion. Easy Grip Knob is designed to make hand tightening easier and less painful on the fingers. Ez Grip Knob also fits into 1" socket for easier installation and removal. Red w/nylon wingnut - 20 per case