There are no best faceting lap in the world, but a great solution will resolve itself.

Size
Outer diameter 150/200 mm,
Center hole 12.7 mm,
Thickness 12 mm

Coating material

Sintering / MCD (Only #180)
Resin / MCD / Self-developed formula

Coating thickness:

2.5 mm

Weight
#180(Sintering)
6 inch 1.7 kg with box
8 inch 2.7 kg with box

#240/#800/#3000(Resin)
6 inch 0.7 kg with box
8 inch 1.3 kg with box

Regular lap grit number
#180 / #240 / #800 / #3000

Price 

#180(Sintering)
6 inch $500 per lap
8 inch $600 per lap

#240/#800/#3000(Resin)
6 inch $450 per lap
8 inch $550 per lap

The price without shipping and PayPal fee.

Pay with PayPal or Zelle (in USA)

You can choose EMS / Fedex / DHL /UPS  for delivery.