The Fupa 12 Ceramic kit includes 2 ceramic cups and a spare diffuser . It performs identical to the original glass version but has the added strength ceramic cups bring. The ceramic version comes only in 3/32 – 2.4 mm tungsten size and will thread on a 45V44 or the 17 Kit . It does not require Orings. The Fupa 12 will handle up to 200 amps non continuance . And it is recommended for DC only applications.