10W Transformer - Replacement for single chime kits.
15W Transformer - Replacement for dual chime kits or to increase chime note output if desired.
30W Transformer - For long runs using dual chimes or to increase chime note output if desired.
Colorful or uniquely patterned glass diffusers are typically hand made and, as such, will exhibit some variation in both color and pattern.
Such variations should be considered normal and indicative of hand crafting rather than machine production.