Miniatronics

8 Ohm Speakers -- 3/4" 19mm Round x 3/16" 4.7mm High (Fits N & HO scale)

8-Ohm Speakers -- 7/8" 22.2mm Round x 5/16" 7.9mm High (Fits HO, O, G & 1 Scales)

8 Ohm Speakers -- 1-1/8" 2.8cm Round x 9/16" 14.2cm High (Fits HO, O, G & #1 Scales)

Digital Command Control Speakers -- Oval 15 x 25mm, 8 Ohm, 1 Watt

Digital Command Control Speakers -- Rectangular 16 x 35mm, 8 Ohm, 1 Watt

Digital Command Control Speakers -- Rectangular 20 x 35mm

Digital Command Control Speakers -- Rectangular 28 x 40mm, 8 Ohm, 2 Watt

8 Ohm Speakers -- 1-7/8 x 2-7/8" 4.6 x 7.1cm Rectangular x 15/16" 23.8mm High (Fits O, G & #1)

8 Ohm Speakers -- 2" 5cm Round x 11/16" 17.4mm High (Fits O, G & #1 Scale)