... , slow performance significantly, and no noise and no comfort Description:Specifications: Ladder: 250 × 350 × 50mm (L * W * H) ends: 170 ... × 350 × 50mm (L * W * H)deceleration zone, also known as speed brakes, slowing arch, buffer strips, speed ... companies.Material: made of high strength rubber, rubber deceleration zone shock absorption, excellent resistance to stress, long life, less ...