Flexible tubes of rubber; Non-metal, plastic and rubber hoses for industrial applications; Rubber sleeves for protecting parts of machinery; Nitrile rubber; Non-metal hoses for commercial marine use; Hoses, not of metal, for commercial marine use; O-rings; O-rings being joint packing for pipes; Metric O-ring kits comprised of non-metal O-rings of various sizes for use as connection seals; Flexible pipes, tubes and hoses, not of metal