I had them made for Seawitch & Star Gazer playfields. 3/4" & 1" trans blue. Since all the vendors had no stock. Marco Specialties received 1000 of each & maybe buying some more stock from me. Nice lenses I had made in Illinois. Northern Precision Plastics
https://pinside.com/pinball/forum/topic/where-are-3-4-blue-transparent-inserts-hiding