Available materials and color for Trocas shell button (click for enlarged and side view): 
 
 
 
Trocas White, Ten quality (upto 40L)
 
Trocas White, yoko quality (upto 24L)
 
Trocas Smoke
 
Trocas Natural (beige)
 
  
 
 
Trocas normal back 'ten' (red spots)
 
Trocas normal back 'yoko' (green spots
 
Trocas round back
 
Trocas clean back
 
Laser effect
 
 
 
Trocas, dye to match 
(point it for back side)
 
Trocas dye to match 
(point it for back side)
Trocas dye to match 
(point it for back side)
 
Trocas dye to match 
(point it for back side)
 
Trocas dye to match 
(point it for back side)
 
                                                                                                     More Available materials  
Contact:  win8@163tom.com