Description Literature Description Freudenberg Sealing Technologies (formerly Tobul) oil port spacer used with TBR30, TBRT30, TBR50 and TBRT50 Bladder accumulator Series, phosphate coated, allows the expanding gas to flow with minimum restriction. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Literature & Docs Accessories