JEGS Vacuum Connectors are constructed from durable heat-resistant plastic, ideal for making spot repairs to vacuum connections that have cracked from heat or element exposure. Connectors are offered in a 113-piece set, a cost-efficient alternative to purchasing them separately. Multiple shapes and sizes have been conveniently packaged in a re-sealable plastic case allowing you to make just the right connections. Set includes a quick reference guide to identify the 12 different connectors; including tees, straights and reducers.