Backer Polishing Pad Diameter: 4"/100mm. Connection: M14, M16, 5/8-11, Snail-lock RUBBER backer pad: Super strengthened adhesive prevents any separation of velcro from the rubber backer itself. Quality grade: Super. NOTE: BP4F: Backer Pad, dia 4"/100mm, Flexiable rubber, Super quality grade. ALUMINUM backer pad: Excellent rigidity, extend pad life. Quality grade: Super. NOTE: BP4A: Backer Pad, dia 4"/100mm, Aluminum, Super quality grade. RIGID BUBBER backer pad: Excellent rigidity, cheap enough to have one for each grit. Quality grade: Super. NOTE: BP4R: Backer Pad, dia 4"/100mm, Rigid rubber, Super quality grade.
