Aspinwall & Co. Ltd. - Coffee Division offers Robusta Parchment A Grade Coffee. Aspinwall & Co. Ltd. - Coffee Division supplies different grades of coffee. Robusta Parchment A Grade Coffee is provided with the standard sieve of minimum 90% by weight retention on a sieve with round holes of 6.65 mm and 100% shall stand on a sieve with round holes of 6.00mm. The garbling status of Robusta Parchment A Grade Coffee is clean garbled. This coffee has the quality of 10% beans passing through the sieve of 7.10mm and standing on the sieve of 6.65mm shall be whole beans. The PB tolerance of this grade of coffee is 2% by weight.