NHL 2021 Commissioner Double-Sided Official Game Replica Hockey Puck (6oz. 1x3"). In clear acrylic presentation-worthy cube. This extremely rare hockey puck design was used at the start of the 2021 NHL season. Inglasco Inc. is the exclusive game puck supplier to all 32 NHL teams. The back of the official game replica puck features the NHL shield printed with patented heat sensitive ink it turns purple when frozen just like the actual puck used in every NHL game!