White Paper on Bearing Seals and Shields including ZZS; ZZ; 2RS; 2RU; 2VS; TTS; Rubber Seals; Felt Seals; and Shrouded Seals.
Some manufacturers put the bearing number on the seals, which is fine if you know that a bearing with 2 seals is referred to as 2RS or a ZZ or 2Z. Customers
Suffix 2RS, 2RSH, 2RS1, LLU, DDU, 2RSR, EE Bearing with two rubber seals. Example 6205 LLU Suffix Z, ZR Bearing with one metal shield. Example 6205 ZR