| Business | Phone |
| Advanced Plastics Technology 2311 E Locust St, Ontario 91761 | (909) 930-1740 |
| Consolidated Container Co 5772 Jurupa St, Ontario 91761 | (909) 390-6637 |
| Custom Plastics 1305 Brooks St, Ontario 91762 | (909) 984-0200 |
| Dragon Molds 1721 S Vineyard Ave # A, Ontario 91761 | (909) 930-1342 |
| Eagle Products Inc 10811 Fremont Ave, Ontario 91762 | (909) 465-1548 |
| Formula Plastics Inc 1180 E Francis St # H, Ontario 91761 | (909) 947-4734 |
| Free Flow Products 1735 S Baker Ave, Ontario 91761 | (909) 947-9471 |
| Honor Plastics 730 E Francis St, Ontario 91761 | (909) 923-9710 |
| Inca Plastics 948 E Belmont St, Ontario 91761 | (909) 923-3235 |
| L & H Molds 2240 E Cedar St, Ontario 91761 | (909) 930-1547 |
| Microdyne Plastics Inc 4651 E Airport Dr, Ontario 91761 | (909) 390-0880 |
| Mission Plastics 1930 S Parco Ave, Ontario 91761 | (909) 947-7287 |
| Han Sun Mold Co 1218 E Airport Dr, Ontario 91761 | (909) 391-4799 |
| Omni Enterprise 610 E State St, Ontario 91761 | (909) 988-2444 |
| Pacific Transfer & Compression 1445 Brooks St # A, Ontario 91762 | (909) 467-0830 |
| Plasthec Molding Inc 1945 S Grove Ave, Ontario 91761 | (909) 947-4115 |
| Plastics Plus Technology 4247 E Airport Dr, Ontario 91761 | (909) 390-8444 |
| Plastirey Containers 1930 S Carlos Ave, Ontario 91761 | (909) 930-6100 |
| Tombyll Plastics Inc 1940 E Locust St # E, Ontario 91761 | (909) 930-2660 |
| Unck's Unique Plastics 1215 Brooks St, Ontario 91762 | (909) 983-5181 |