The Dynamo Air Hockey Shields are designed to keep the puck in play under the most aggressive play. Can be used with these Dynamo Air Hockey Tables: Pro Style Hockey Tables - Firestorm Air Hockey Table - and Hot Flash II Air Hockey Table. Three pieces included: 2 side shields and a cross shield. 8-foot tables use all 3 pieces; 7-foot tables use only the side shields. Made of Lexan.