Natural Rubber Sheet STR20 Origin: Thailand Packing: Shrink Wrapped Pallet 1.26 MT/Pallet Specification: Dirt (retained on 44 u aperture) %wt. Limited: 0.16 Max Ash %wt. Limited: 0.80 Max Volatile matter %wt. Limited: 0.80 Max Nitrogen %wt. Limited: 0.60 Max Initial Wallace Plasticity (Pe / Range) Limited: 30 Min Plasticity Retention Index (PRI) Limited: 40 Min